四则混合运算(四年级下)
小学人教版四年级下册数学四则混合运算 3000题
月日姓名:练习范围:四则运算题数:100分秒成绩:48 ÷ (7 + 9) × 57 = 4 × (48 + 36) ÷ 12 = 810 ÷ 54 + 992 =5 × (45 - 27) ÷ 9 = 522 ÷ 58 = 16 × (26 + 65) ÷ 13 = 73 × 13 + 515 = 90 ÷ (15 - 5) × 9 = 9 × (16 + 4) ÷ 4 = 88 ÷ (8 + 3) × 89 = 126 ÷ (11 + 3) × 85 = 870 ÷ 10 + 181 =10 × (70 + 42) ÷ 14 = (48 + 36) ÷ 12 = 481 - 361 =9 × (10 + 18) ÷ 14 = 448 ÷ 14 + 447 = (52 - 32) ÷ 5 =20 × 63 - 450 = (6 + 12) ÷ 6 = (20 + 16) ÷ 4 =(36 + 36) ÷ 9 = 8 × (20 + 8) ÷ 4 = (18 - 2) ÷ 8 =(7 + 21) × 46 = 168 ÷ 21 = (100 - 80) ÷ 20 =41 × 172 = 17 × (72 + 36) ÷ 18 = 12 × (36 + 36) ÷ 18 = (16 + 16) ÷ 16 = 492 ÷ 82 = 6 ÷ (7 - 5) × 56 = (3 + 4) ÷ 1 = 1 × (85 - 15) ÷ 14 = 108 ÷ (16 + 2) × 57 = 8 × 46 - 116 = 133 ÷ (16 + 3) × 71 = 354 - 235 =870 ÷ 15 = (24 + 4) ÷ 7 = 2 × (14 + 6) ÷ 10 = 801 ÷ 89 + 340 = (39 - 30) ÷ 3 = 924 ÷ 33 =90 ÷ (16 - 6) × 92 = 8 × (42 - 12) ÷ 10 = 79 × 97 - 633 =462 ÷ 7 + 398 = 70 + 189 = (34 - 10) ÷ 12 =738 ÷ 9 + 742 = (12 - 6) ÷ 3 = 9 × (9 + 18) ÷ 9 = 27 ÷ (1 + 2) × 52 = 77 × 49 + 355 = 336 ÷ 21 - 11 =430 + 278 = (9 + 3) ÷ 12 = 144 ÷ 3 - 20 =(6 + 27) ÷ 11 = 760 ÷ 19 - 26 = 15 ÷ (7 - 4) × 32 = 540 ÷ 15 - 27 = 40 ÷ (12 - 7) × 55 = 1 × (38 + 95) ÷ 19 = 16 × (6 + 10) ÷ 8 = (97 - 13) × 54 = (28 + 35) ÷ 7 =(4 + 16) ÷ 10 = (24 - 6) ÷ 6 = 40 × 29 + 201 =980 ÷ 10 - 62 = 99 ÷ 9 + 834 = 308 - 13 =665 ÷ 19 - 20 = 60 × 99 = 232 - 138 =(40 + 40) ÷ 16 = 9 × (24 + 16) ÷ 8 = 616 ÷ 28 =4 × (32 + 48) ÷ 16 = (64 - 52) × 14 = 52 × 48 + 391 =168 ÷ (16 + 8) × 90 = 101 + 369 = 207 ÷ (15 + 8) × 49 = 9 × (85 - 17) ÷ 17 = (36 + 36) × 52 = (16 + 12) ÷ 4 =(58 - 30) × 55 = 7 × (34 + 51) ÷ 17 = 17 × (9 + 12) ÷ 7 = 312 + 31 = (11 + 34) × 56 = 152 - 89 =16 × (54 - 18) ÷ 18 = 76 × 3 + 23 = 112 ÷ (11 + 5) × 30 = 381 - 144 =月日姓名:练习范围:四则运算题数:100 分秒成绩:36 ÷ (1 + 8) × 6 = (3 + 15) ÷ 6 = (75 - 15) ÷ 12 = 77 × 26 + 182 = 18 ÷ (2 + 7) × 23 = 19 × (14 + 2) ÷ 8 = (80 - 67) × 15 = 486 - 426 = 80 ÷ (6 + 4) × 65 = 10 × (60 - 24) ÷ 12 = 15 × (6 + 12) ÷ 9 = 410 ÷ 10 =86 × 56 - 891 = 462 + 324 = (32 - 24) × 11 = 851 ÷ 23 = 602 ÷ 43 = 840 ÷ 40 =(100 - 60) ÷ 20 = 2 × (40 + 30) ÷ 14 = 472 + 169 =6 × (32 + 32) ÷ 8 = 169 + 500 = 84 ÷ 1 - 79 =48 + 134 = 222 ÷ 6 - 20 = 7 ÷ (13 - 6) × 73 = (30 - 15) ÷ 3 = 19 × (27 - 18) ÷ 9 = (4 + 8) ÷ 6 =(64 - 48) ÷ 16 = 18 × (54 + 54) ÷ 18 = 234 ÷ 13 + 232 = 238 - 209 = (60 + 75) ÷ 15 = 27 × 43 - 286 = 609 ÷ 7 - 63 = 629 ÷ 17 = 152 ÷ 2 - 44 = 137 - 77 = (34 + 25) × 17 = 880 ÷ 16 + 334 = 418 ÷ 38 + 178 = (9 + 15) ÷ 3 = (95 - 61) × 56 =(8 + 24) ÷ 8 = (89 - 6) × 78 = (12 + 18) ÷ 15 = 850 ÷ 10 + 297 = 352 - 253 = (42 - 36) × 93 = 858 ÷ 33 = (2 + 4) × 28 = 391 + 430 =80 × 25 + 647 = 373 - 73 = 92 + 404 =43 × 75 + 940 = 8 × (16 - 4) ÷ 4 = 197 + 376 =6 × (5 + 2) ÷7 = 19 × (90 - 75) ÷ 3 = 100 ÷ 50 + 273 = (38 - 1) × 60 = (38 + 19) ÷ 19 = (8 + 46) × 38 = 256 ÷ 64 = 12 × (4 + 18) ÷ 11 = (54 - 18) ÷ 18 = (28 - 11) × 50 = 8 × (20 + 28) ÷ 12 = 353 - 19 =35 ÷ (13 - 6) × 86 = (16 - 4) ÷ 6 = 224 - 11 =198 ÷ (14 + 8) × 71 = 8 × (44 - 11) ÷ 11 = 67 × 23 - 248 = (85 - 75) ÷ 2 = 66 × 29 - 458 = 1 × (21 + 21) ÷ 7 = (15 + 35) ÷ 10 = 10 × (10 + 5) ÷ 3 = (80 - 48) ÷ 16 = (5 + 40) ÷ 9 = (32 - 16) ÷ 16 = 3 × 120 =(5 + 3) ÷ 1 = (6 - 1) ÷ 5 = (42 - 3) ÷ 13 = (72 - 54) ÷ 18 = (39 - 6) ÷ 11 = 14 × (24 + 32) ÷ 8 = 117 ÷ (18 - 5) × 21 = (1 + 39) × 24 = 83 × 23 + 882 = (48 - 20) ÷ 7 = 73 × 59 = 4 × (36 + 24) ÷ 15 = 95 × 14 + 183 =月日姓名:练习范围:四则运算题数:100 分秒成绩:5 + 4 = 127 + 279 = 11 × (10 - 2) ÷ 2 = 153 ÷ (13 + 4) × 29 = 307 - 306 = (40 - 27) × 38 =13 × (48 - 32) ÷ 16 = (49 - 20) × 20 = 15 × (75 + 75) ÷ 15 = 10 × 93 - 924 = 14 × (3 + 9) ÷ 3 = 15 × (5 + 10) ÷ 5 = 115 ÷ (16 + 7) × 79 = 72 ÷ (16 - 8) × 30 = 195 ÷ 65 + 766 =19 × (48 - 36) ÷ 12 = 339 - 262 = 45 × 86 + 160 =(4 + 16) ÷ 4 = 736 ÷ 16 = 8 × (85 + 17) ÷ 17 = (14 - 12) ÷ 1 = 12 × (16 + 16) ÷ 16 = (24 + 12) ÷ 12 =1 × (14 - 4) ÷ 10 = 435 ÷ 15 - 23 = 112 ÷ (12 + 2) × 18 = 504 ÷ 18 - 16 = 195 ÷3 - 38 = 429 - 368 =7 × 64 - 58 = (90 - 54) ÷ 18 = 855 ÷ 45 - 17 =11 × (8 + 4) ÷ 3 = 4 × (56 - 32) ÷ 6 = 2 × (10 - 8) ÷ 2 = 309 + 490 = (4 + 18) ÷ 11 = 15 × 63 - 876 =960 ÷ 16 - 46 = 26 × 37 - 654 = 2 × (4 - 1) ÷ 1 =96 ÷ 1 - 77 = 5 × (56 - 52) ÷ 1 = 222 ÷ 37 + 726 =282 - 225 = (2 + 2) ÷ 2 = (64 - 16) ÷ 16 = 384 ÷ 96 = 285 - 74 = (6 + 20) × 34 =12 ÷ (12 - 6) × 95 = 16 × (24 - 9) ÷ 5 = 475 ÷ 5 - 91 =(77 - 15) × 62 = 18 × 81 - 909 = 350 ÷ 14 =91 ÷ (7 + 6) × 36 = 924 ÷ 66 = 48 ÷ (15 + 9) × 79 = 11 × (5 + 5) ÷ 5 = 4 × (24 - 8) ÷ 8 = (45 + 7) × 66 =6 × 43 - 190 = (85 - 80) × 54 = (18 + 21) ÷ 13 = 444 - 368 = 57 × 18 = (94 - 34) × 64 = 720 ÷ 15 - 13 = 7 × 22 + 99 = 220 ÷ 4 + 212 =4 × (6 + 6) ÷ 2 = (9 + 1) ÷ 10 = (51 - 32) × 57 = (24 - 14) ÷5 = 96 × 96 + 535 = 12 × (52 - 12) ÷ 10 = 12 × (95 - 55) ÷ 8 = 19 ÷ (15 + 4) × 72 = 1 × (57 - 38) ÷ 19 = 7 × (68 - 17) ÷ 17 = 16 × (80 - 16) ÷ 16 = 376 - 237 =(70 - 25) ÷ 9 = 91 × 54 - 376 = 480 ÷ 30 =10 × (35 + 35) ÷ 14 = (100 - 60) ÷ 20 = 42 × 16 =(6 + 18) ÷ 8 = 169 - 140 = 19 × (21 - 7) ÷ 7 = 60 ÷ (18 - 8) × 2 = 17 × (7 + 2) ÷ 9 = (18 + 72) ÷ 18 = (40 + 36) × 84 = 34 ÷ (8 + 9) × 48 = 2 × (48 - 15) ÷ 11 = (9 + 4) ÷ 13 =月日姓名:练习范围:四则运算题数:100 分秒成绩:(4 + 16) ÷ 4 = (36 + 54) ÷ 18 = 46 × 73 - 591 = (18 + 30) ÷ 6 = 151 + 408 = (40 + 35) ÷ 15 =52 × 38 + 585 = (36 - 15) ÷ 7 = 4 × (38 + 76) ÷ 19 = 296 ÷ 74 + 81 = 18 × (44 - 28) ÷ 4 = (22 + 15) × 32 =1 × (10 + 35) ÷ 9 = 32 ÷ (16 - 8) ×3 = 123 × 73 =17 × (85 - 80) ÷ 1 = 14 × (14 + 6) ÷ 10 = (89 - 81) × 96 = (20 + 4) ÷ 4 = (12 + 48) ÷ 12 = (22 + 2) × 14 = 368 + 416 = (4 + 49) × 35 = (75 - 5) ÷ 14 = (10 - 2) ÷ 4 = 46 × 138 = 48 ÷ (9 - 3) × 90 = (15 + 15) ÷ 6 = 9 × (95 - 57) ÷ 19 = (24 + 6) ÷ 6 =(21 + 31) × 58 = (97 - 89) × 32 = (20 + 29) × 53 = (67 - 30) × 92 = 10 × (16 - 1) ÷ 15 = 540 ÷ 36 =28 ÷ (10 - 6) × 16 = (78 - 64) × 66 = (57 - 48) ÷ 3 =722 ÷ 19 - 37 = 990 ÷ 22 + 429 = 487 - 367 =10 ÷ (4 + 1) × 79 = 14 × (36 + 18) ÷ 18 = (10 + 30) ÷ 10 =12 × (20 + 4) ÷ 6 = 396 ÷ 18 - 14 = 3 × (39 - 26) ÷ 13 = 16 × (25 + 15) ÷ 5 = 487 + 306 = 427 ÷ 61 + 887 = (45 - 36) ÷ 3 = 15 × 42 + 40 = (52 - 24) ÷ 7 =(8 + 7) ÷ 15 = 85 ÷ (13 + 4) × 2 = 4 × (17 - 11) ÷ 6 = 34 × 83 + 784 = (95 - 76) ÷ 19 = (41 + 23) × 5 = 620 ÷ 31 + 462 = 5 × (24 + 18) ÷ 14 = 288 - 216 =936 ÷ 26 = (15 + 29) × 58 = (32 - 8) ÷ 12 =4 × (40 - 24) ÷ 4 = (24 - 12) ÷ 12 = 209 - 166 =960 ÷ 12 = 9 × (6 - 4) ÷ 2 = 91 × 48 + 219 = 17 × (35 + 14) ÷ 7 = 17 × (51 - 45) ÷ 2 = 4 ÷ (10 - 6) × 74 = 52 × 139 = (16 + 2) ÷ 9 = 79 + 17 =(54 - 35) × 57 = (42 + 70) ÷ 14 = 5 × (35 - 28) ÷ 7 = 91 ÷ (8 + 5) × 73 = (18 - 9) ÷ 9 = 15 ÷ (10 - 7) × 94 = 146 × 15 = 425 ÷ 17 = 288 ÷ 72 =2 × (90 - 36) ÷ 18 = 26 ÷ (17 - 4) × 36 = (45 - 27) ÷ 9 =3 × (2 + 8) ÷ 2 = (10 - 4) ÷ 3 = (40 + 40) ÷ 16 = (8 - 2) ÷ 2 = (82 - 14) × 75 = (11 + 42) × 59 = 22 × 38 + 248 = 144 ÷ (13 + 5) × 47 = 3 × (20 - 12) ÷ 2 = 11 × 28 + 674 =月日姓名:练习范围:四则运算题数:100 分秒成绩:9 × (2 + 4) ÷ 3 = (9 - 3) ÷ 6 = (18 - 8) ÷ 10 =12 ÷ (6 - 3) × 13 = 16 × (33 - 3) ÷ 10 = (32 + 36) ÷ 17 = 12 × (45 + 20) ÷ 13 = 1 × (30 + 35) ÷ 13 = 42 ÷ (7 + 7) × 45 = 59 × 11 + 879 = (26 + 13) ÷ 13 = 1 × (24 + 6) ÷ 10 = 13 × (68 - 52) ÷ 4 = 78 × 81 - 514 = 15 × (64 - 60) ÷ 1 = 121 × 38 = 126 ÷ (15 - 1) × 18 = 732 ÷ 61 =(86 - 70) × 24 = (24 + 21) ÷ 15 = 506 ÷ 23 =64 ÷ (17 - 9) × 97 = 884 ÷ 17 = 81 ÷ (6 + 3) × 49 = 63 ÷ (14 - 5) × 50 = 183 - 27 = 24 ÷ (7 + 5) × 69 = (12 + 21) ÷ 11 = (13 - 5) ÷ 8 = 336 ÷ 7 - 42 =624 ÷ 16 = (95 - 35) ÷ 12 = 38 × 96 - 136 = (36 - 33) ÷ 1 = 68 × 22 - 612 = 11 × (17 - 8) ÷ 9 = 11 × (21 - 7) ÷ 7 = 20 × 20 = 294 + 89 =675 ÷ 15 = 54 × 51 + 455 = 792 ÷ 12 + 386 = (9 + 36) ÷ 9 = 4 × (65 - 26) ÷ 13 = 115 × 70 =(17 + 37) × 89 = 26 × 64 + 128 = 15 × (36 - 16) ÷ 10 = 12 × (95 - 60) ÷ 7 = 32 ÷ (1 + 7) × 27 = 21 ÷ (5 + 2) × 5 = (4 + 5) ÷ 9 = 31 × 39 + 462 = 95 × 74 - 835 =304 - 30 = 7 × 47 - 13 = 11 × (90 - 5) ÷ 17 = (65 - 50) ÷ 3 = 438 ÷ 6 - 55 = (82 - 53) × 13 = (20 + 30) ÷ 10 = 5 × (6 - 3) ÷ 3 = (22 + 22) ÷ 11 = 265 - 154 = 531 ÷ 59 + 728 = 250 ÷ 10 =744 ÷ 24 - 23 = 10 × 75 - 302 = 11 × (60 - 24) ÷ 12 = 437 - 35 = (95 + 95) ÷ 19 = 117 × 55 =187 + 422 = (14 + 7) × 54 = (74 - 59) × 52 = (36 + 27) ÷ 9 = 16 × (10 - 8) ÷ 2 = 16 × (68 - 12) ÷ 14 = 24 ÷ (15 - 9) × 15 = (18 - 9) ÷ 9 = 404 - 26 =(40 + 28) × 63 = 31 × 60 - 41 = (12 + 3) ÷ 5 =(31 + 8) × 91 = 62 × 8 = 867 ÷ 17 =14 × (28 - 20) ÷ 4 = (18 + 6) ÷ 12 = 167 - 77 =4 ÷ (11 - 9) × 54 = 13 × (36 + 36) ÷ 12 = 8 × 189 =(40 - 16) ÷ 8 = 26 ÷ (16 - 3) × 90 = 480 - 266 =(6 + 29) × 87 = (88 - 85) × 51 = 432 ÷ 27 =5 × 9 + 933 =月日姓名:练习范围:四则运算题数:100 分秒成绩:(20 + 30) ÷ 10 = 5 × (14 + 14) ÷ 14 = 51 × 72 - 196 =450 + 97 = 95 × 10 - 889 = (3 + 2) ÷ 5 =(21 + 15) × 7 = 240 ÷ 15 + 276 = 55 × 32 + 118 =497 ÷ 7 - 18 = 12 × (24 - 8) ÷ 8 = (76 - 15) × 72 =7 × (60 - 20) ÷ 20 = (21 + 45) × 90 = 76 × 49 - 994 =162 × 54 = 5 ÷ (11 - 6) × 37 = 8 × (5 + 10) ÷ 5 = (24 + 7) × 13 = 356 - 171 = 238 ÷ 7 + 33 =(16 + 28) × 85 = 1 × (38 - 12) ÷ 13 = 144 ÷ (18 + 6) × 19 = 891 ÷ 27 - 29 = 900 ÷ 90 - 10 = 57 × 64 - 469 = (12 + 30) ÷ 6 = 86 × 93 + 939 = 4 × (57 - 19) ÷ 19 = 65 × 85 + 878 = (36 + 18) × 29 = 56 × 22 - 936 =120 - 58 = 112 ÷ (8 + 6) × 21 = 497 ÷ 7 + 147 = (85 - 15) × 42 = (12 - 3) ÷ 3 = 84 × 41 - 589 =(6 + 6) ÷ 2 = 46 × 28 - 610 = (52 - 34) × 77 =78 ÷ 1 + 166 = (16 + 6) ÷ 11 = (17 - 13) ÷ 4 =(54 - 36) × 47 = (49 - 35) × 50 = 54 × 63 + 184 = (66 - 32) × 69 = 14 × (16 + 4) ÷ 10 = (9 + 27) ÷ 12 = (34 + 48) × 85 = (26 - 4) ÷ 11 = 5 × (80 - 60) ÷ 4 = 21 ÷ (7 - 4) × 12 = (38 - 18) ÷ 10 = (15 - 10) ÷ 5 =(18 - 2) ÷ 16 = (64 - 12) ÷ 13 = 11 × (8 + 40) ÷ 8 = (17 + 11) × 22 = 8 ÷ (11 - 9) × 93 = 13 × (17 - 3) ÷ 14 = 72 × 10 = 5 × (24 + 4) ÷ 7 = 49 × 14 =431 + 229 = 10 × (50 - 30) ÷ 4 = 144 ÷ (18 - 2) × 44 = (45 - 36) ÷ 9 = 62 × 62 + 618 = 20 × 91 - 833 =3 × (28 - 20) ÷4 = 72 ÷ (7 + 1) × 60 = 69 × 62 - 963 = (18 + 18) ÷ 9 = (60 - 20) ÷ 8 = 224 - 58 =70 ÷ 1 - 60 = 68 × 14 + 398 = 18 × (95 - 85) ÷ 2 = 544 ÷ 17 = (18 + 18) ÷ 18 = 846 ÷ 94 =(57 - 42) × 33 = 84 ÷ (12 + 9) × 57 = 85 × 16 - 30 =442 + 1 = 18 × (9 + 24) ÷ 11 = (57 - 3) ÷ 18 =(13 + 8) × 26 = 15 × (8 + 5) ÷ 13 = (29 + 6) × 3 =(26 + 39) ÷ 13 = 75 × 129 = 850 ÷ 17 =(24 + 15) ÷ 13 = 19 × (4 - 2) ÷ 1 = 504 ÷ 8 - 25 =(80 - 10) ÷ 14 =月日姓名:练习范围:四则运算题数:100 分秒成绩:14 × (75 - 60) ÷ 15 = 92 × 76 = (2 + 14) ÷ 8 =504 ÷ 24 - 17 = 790 ÷ 79 + 509 = 91 ÷ (16 - 3) × 39 = (9 - 6) ÷ 1 = 71 × 16 - 805 = (58 - 52) × 58 = 432 ÷ 8 + 315 = 6 × (9 - 3) ÷ 3 = (19 + 4) × 16 =56 ÷ (15 - 8) × 94 = 11 × (6 + 15) ÷ 3 = (97 - 67) × 93 = (31 + 23) × 70 = 21 × 71 - 282 = 46 × 63 - 979 = (18 - 1) ÷ 17 = 19 × (20 + 8) ÷ 7 = 112 ÷ (18 - 4) × 17 = 765 ÷ 9 - 19 = 15 × (15 + 25) ÷ 8 = 693 ÷ 63 + 319 = 100 ÷ (15 + 5) × 81 = 25 × 24 - 63 = (38 - 18) ÷ 10 =12 × (60 - 15) ÷ 15 = 540 ÷ 10 - 50 = (49 + 40) × 2 =20 ÷ (10 - 6) × 62 = (44 + 27) × 53 = 71 × 60 - 308 = (80 - 25) × 77 = (18 - 3) ÷ 5 = (14 + 14) ÷ 14 = (65 - 13) ÷ 13 = (21 + 37) × 75 = 79 × 61 =(62 - 48) × 13 = (15 + 3) ÷ 3 = (16 + 10) ÷ 13 =19 × (12 + 24) ÷ 12 = (48 - 40) ÷ 2 = 623 ÷ 89 + 166 =264 + 396 = 8 × (18 + 90) ÷ 18 = (32 - 26) ÷ 3 =(28 - 19) × 23 = (8 + 16) ÷ 4 = 1 × (1 + 1) ÷ 2 =93 × 37 + 621 = 122 × 21 = 133 ÷ (13 + 6) × 48 = 9 × (12 + 6) ÷ 3 = (20 - 10) ÷ 10 = 132 × 22 =(8 + 2) ÷ 10 = (74 - 7) × 35 = 6 × (48 - 32) ÷ 16 = 288 ÷ 3 - 32 = 17 × (10 + 14) ÷ 12 = 12 × (95 - 57) ÷ 19 = 16 × (55 + 44) ÷ 11 = 21 ÷ (11 - 8) × 24 = (44 - 20) ÷ 6 =57 × 66 = (78 - 6) × 31 = 4 × (38 - 19) ÷ 19 = (8 + 4) ÷ 3 = (90 - 18) ÷ 18 = 450 - 14 =186 + 404 = 3 × (39 + 13) ÷ 13 = 63 ÷ (4 + 3) × 44 = 5 × (2 + 2) ÷ 4 = 190 + 466 = 92 × 55 =26 ÷ (15 - 2) × 97 = 28 × 22 + 825 = (63 - 61) × 87 =17 × (33 - 22) ÷ 11 = 90 × 12 - 868 = (51 - 15) ÷ 12 =92 × 91 + 67 = 16 ÷ (12 - 8) × 27 = 135 × 68 =10 × (3 + 24) ÷ 9 = (21 + 37) × 24 = (6 + 9) ÷ 15 =(21 + 15) ÷ 12 = 3 × (8 + 6) ÷ 7 = (8 + 20) ÷ 4 =108 ÷ (16 + 2) × 11 = 144 ÷ 2 + 566 = (20 + 10) ÷ 6 =8 × 189 = (8 + 22) × 58 = 320 ÷ 5 + 185 =356 ÷ 89 + 839 =月日姓名:练习范围:四则运算题数:100 分秒成绩: (72 + 18) ÷ 18 = 98 × 78 - 291 = 15 × (18 - 10) ÷ 8 = 9 × 19 - 83 = 27 ÷ (16 - 7) × 8 = 272 ÷ 16 =(50 - 40) ÷ 10 = 35 ÷ (12 - 5) × 45 = (88 - 30) × 98 =67 + 500 = 120 ÷ (18 + 6) × 91 = 20 ÷ (9 - 5) × 46 = 42 ÷ (7 + 7) × 13 = 414 ÷ 9 - 44 = 10 × (7 + 1) ÷ 8 = (16 + 28) ÷ 11 = (96 - 33) × 1 = 4 × (15 + 10) ÷ 5 = (90 - 57) × 34 = 15 × (32 - 16) ÷ 8 = 14 ÷ (5 + 9) × 12 = 7 × (30 - 20) ÷ 10 = 93 × 44 + 925 = 850 ÷ 10 + 66 =25 × 84 + 885 = 158 × 56 = 42 × 52 + 889 =6 × 83 + 360 = 28 ÷ (17 - 3) × 21 = (28 + 35) ÷ 7 =76 × 40 + 56 = 340 ÷ 17 + 609 = 41 × 97 - 982 = (13 + 31) × 25 = (40 - 24) ÷ 8 = 357 ÷ 21 =5 × (60 - 25) ÷ 7 = 243 ÷ 3 - 12 = 99 × 71 - 721 = 540 ÷ 9 - 23 = (9 + 3) ÷ 4 = 24 × 89 + 129 = (20 + 20) ÷ 8 = 630 ÷ 18 = 95 × 41 + 430 =39 × 177 = (17 + 27) × 81 = 1 × (6 + 9) ÷ 15 =8 × (57 - 24) ÷ 11 = 418 - 377 = (3 + 6) ÷ 3 =41 × 39 + 457 = 482 - 242 = 327 - 137 =(56 + 42) ÷ 14 = 12 ÷ (19 - 7) × 78 = 2 × (56 + 42) ÷ 14 = (36 + 31) × 79 = 7 × (12 + 18) ÷ 6 = 365 ÷ 73 =41 × 32 - 449 = 15 × (45 - 3) ÷ 14 = (44 + 5) × 33 = (21 + 20) × 6 = (68 + 85) ÷ 17 = 69 × 50 =(4 + 12) ÷ 4 = 1 × (45 - 27) ÷ 9 = 12 ÷ (11 - 5) × 45 = 65 × 53 + 614 = 2 × (19 - 4) ÷ 15 = 98 × 11 - 687 =18 × 10 = 31 × 87 = 8 × (39 - 26) ÷ 13 = 954 ÷ 53 - 13 = 6 × (27 - 24) ÷ 1 = 64 ÷ (10 - 2) × 91 = (8 + 32) ÷ 8 = (34 - 2) ÷ 16 = 30 × 33 =11 × (90 + 36) ÷ 18 = 56 × 35 + 7 = 18 × (75 - 45) ÷ 15 = (46 + 4) × 58 = (44 + 18) × 31 = 19 × 90 =455 - 419 = (9 + 12) ÷ 7 = 33 ÷ (18 - 7) × 7 = (9 + 14) × 47 = 5 × (20 - 16) ÷ 4 = 8 ÷ (11 - 3) × 32 = (98 - 81) × 44 = (39 + 44) × 83 = (12 - 4) ÷ 8 =147 ÷ (16 + 5) × 63 = 26 × 9 + 325 = 286 ÷ 22 =(39 + 22) × 96 =月日姓名:练习范围:四则运算题数:100 分秒成绩:546 ÷ 26 + 748 = 567 ÷ 27 - 15 = 172 × 47 =(50 - 40) ÷ 10 = 590 ÷ 59 + 537 = 13 × (18 + 21) ÷ 13 = 8 × (20 + 20) ÷ 5 = 10 × (12 - 3) ÷ 3 = 12 × (7 + 3) ÷ 10 = 4 × (2 + 2) ÷ 1 = 2 × (20 + 20) ÷ 5 = (80 - 35) ÷ 9 =35 × 21 - 415 = (60 + 60) ÷ 12 = 616 ÷ 11 - 47 =17 × (45 - 27) ÷ 6 = 7 ÷ (13 - 6) × 95 = 63 × 19 =(15 + 43) × 45 = 19 × (20 - 10) ÷ 10 = 368 ÷ 23 + 748 =3 × (5 - 3) ÷ 2 = 728 ÷ 91 = 260 ÷ 13 =(8 - 4) ÷ 1 = 347 - 153 = (47 + 11) × 36 = (35 + 37) × 29 = 16 × (16 + 16) ÷ 16 = 9 × (65 - 13) ÷ 13 = 6 × (21 - 7) ÷ 7 = (68 - 51) ÷ 17 = 11 × (28 - 21) ÷ 7 = (49 - 10) × 16 = 3 × (75 - 60) ÷ 15 = (90 - 46) × 13 =52 × 131 = 294 ÷ 49 = 18 × (16 - 1) ÷ 15 = 291 - 70 = (28 - 18) ÷ 5 = 7 × (17 + 17) ÷ 17 = 63 ÷ (14 - 5) × 87 = (30 + 39) × 10 = 402 - 69 =5 × (30 - 12) ÷6 = 120 ÷ 15 = 14 × (10 + 12) ÷ 11 = 38 × 83 + 398 = 3 × (25 + 5) ÷ 5 = (52 - 26) ÷ 13 =2 × (8 - 4) ÷ 4 = (60 - 48) ÷ 12 = 42 × 10 + 352 =432 ÷ 9 - 38 = 7 × (30 + 35) ÷ 13 = (7 + 2) ÷ 9 =24 ÷ (1 + 5) × 39 = (1 + 1) ÷ 2 = 4 × (15 + 24) ÷ 13 = 27 × 67 - 43 = 19 × (57 + 76) ÷ 19 = 44 ÷ (15 - 4) × 53 = 21 ÷ (3 + 4) × 56 = (48 + 45) × 69 = 77 + 114 =(9 - 6) ÷ 3 = (38 - 8) ÷ 15 = (54 - 18) ÷ 18 =380 ÷ 5 + 218 = (91 - 58) × 2 = 71 × 31 - 849 = (41 - 18) × 9 = 650 ÷ 10 - 26 = (12 + 14) ÷ 13 =7 × (60 - 5) ÷ 11 = 126 ÷ (9 + 5) × 62 = (20 + 30) × 26 = (33 - 22) ÷ 11 = 50 × 78 + 199 = 264 ÷ 22 + 462 = 949 ÷ 13 - 64 = (18 + 9) ÷ 9 = (48 - 16) ÷ 16 = (72 - 54) ÷ 18 = 715 ÷ 65 = 6 × (10 + 30) ÷ 8 = (7 + 6) ÷ 13 = (36 + 49) × 42 = 9 × (21 - 15) ÷ 2 = 112 ÷ (13 + 3) × 31 = 19 × 110 = (26 - 13) ÷ 13 =16 × 97 + 589 = 57 × 29 + 978 = (3 - 2) ÷ 1 =(42 + 24) × 36 = 50 ÷ (2 + 8) × 40 = 81 × 46 - 123 =552 ÷ 46 + 765 =月日姓名:练习范围:四则运算题数:100 分秒成绩:11 × (55 - 22) ÷ 11 = 13 × (25 + 30) ÷ 11 = 480 + 326 =(97 - 92) × 42 = 385 + 318 = (32 + 13) × 47 =19 × (6 + 24) ÷ 6 = 36 ÷ (10 - 6) × 59 = 304 ÷ 38 =60 ÷ (16 - 4) × 48 = (54 - 3) ÷ 17 = 800 ÷ 16 =18 × (65 + 52) ÷ 13 = 21 × 66 - 555 = 18 × (60 + 12) ÷ 12 = 9 × (27 - 9) ÷ 6 = 53 × 82 = (44 - 11) ÷ 11 =16 × 75 - 887 = 196 ÷ 49 = 11 × (21 + 14) ÷ 7 = 164 ÷ 4 + 628 = 20 × 74 = 84 × 30 + 265 = (10 + 17) × 9 = (92 - 48) × 25 = 306 ÷ 17 =71 × 135 = 60 ÷ (18 - 3) × 52 = (25 + 20) ÷ 5 =(34 - 17) ÷ 17 = (76 - 52) × 83 = 207 ÷ (17 + 6) × 73 = 109 + 348 = (12 + 24) ÷ 12 = 90 ÷ (2 + 8) × 66 = (24 - 19) × 42 = 116 × 74 = 3 × (48 - 16) ÷ 16 = 69 × 74 - 780 = (12 - 9) ÷ 3 = 1 × (95 - 30) ÷ 13 = (35 - 32) × 13 = 321 + 172 = 393 - 306 =4 × 57 + 209 = 168 ÷ 28 + 244 = (53 - 8) × 59 =620 ÷ 10 - 22 = 5 ÷ (6 - 5) × 27 = 34 ÷ (13 + 4) × 28 = 9 × 70 + 19 = (80 - 72) × 75 = 28 × 30 - 26 = (57 - 48) ÷ 3 = 78 × 51 + 96 = 52 ÷ (8 + 5) × 70 = (32 + 28) ÷ 15 = 4 × (26 - 13) ÷ 13 = 61 × 65 - 805 =4 × (36 + 16) ÷ 13 = 23 × 28 - 19 = 341 - 279 =380 ÷ 4 - 16 = 377 - 109 = 119 × 13 =341 - 16 = 30 ÷ (11 - 5) × 42 = 79 - 66 =4 × (52 - 36) ÷ 4 = (18 - 7) ÷ 11 = 35 × 124 =(8 + 13) × 51 = 8 ÷ (3 - 2) × 15 = 29 × 47 =362 - 315 = 825 ÷ 15 - 42 = 252 ÷ 3 - 13 =(6 + 2) ÷ 4 = 12 × 26 - 169 = 78 × 34 + 405 = (3 + 3) ÷ 3 = (20 + 4) ÷ 4 = (16 - 10) ÷ 6 =29 + 364 = 102 ÷ (15 + 2) × 35 = 1 × 57 + 997 = (14 + 28) × 61 = 14 × (9 - 6) ÷ 3 = 15 × (45 + 5) ÷ 10 = 75 + 78 = (65 - 30) ÷ 7 = 440 - 137 =182 × 46 = 68 × 138 = (10 + 6) ÷ 2 =18 × (35 + 35) ÷ 14 = 59 × 99 + 560 = (28 + 36) ÷ 16 =11 × (42 + 56) ÷ 14 =月日姓名:练习范围:四则运算题数:100 分秒成绩:(47 + 42) × 89 = 1 × (80 - 60) ÷ 20 = 12 × (30 + 10) ÷ 10 = 4 × (95 + 19) ÷ 19 = 2 × (15 + 15) ÷ 3 = 369 ÷ 41 =(86 - 60) × 13 = 412 + 495 = 5 × (2 + 10) ÷ 6 = (12 + 17) × 16 = (66 - 7) × 2 = 4 ÷ (8 - 4) × 19 =18 × (18 + 72) ÷ 18 = 15 × (10 + 30) ÷ 10 = 2 + 365 =806 ÷ 26 + 188 = (78 - 44) × 67 = 39 × 46 + 171 =6 × (22 - 4) ÷ 9 = 8 × (14 + 21) ÷7 = 4 × (56 - 28) ÷ 7 = 19 × (9 + 3) ÷ 3 = 51 ÷ (8 + 9) × 92 = (80 + 80) ÷ 16 =6 × 180 = 33 ÷ (6 + 5) × 41 = 8 × (60 - 30) ÷ 15 = 492 ÷ 6 - 54 = 4 + 215 = 192 ÷ (18 + 6) × 96 = 11 × 45 = (12 + 21) ÷ 11 = 9 × (85 - 68) ÷ 17 = 18 × (8 + 8) ÷ 4 = 52 × 69 - 410 = 220 + 15 =(11 - 6) × 15 = 278 + 467 = 13 × (12 - 1) ÷ 11 = (92 - 9) × 71 = 352 + 235 = (65 - 25) ÷ 8 =75 ÷ (16 - 1) × 3 = 14 × 142 = 64 × 25 + 967 =4 ÷ (11 - 9) × 74 = 196 ÷ 2 - 55 = 16 × (24 + 60) ÷ 12 = 405 - 279 = (44 + 55) ÷ 11 = 234 + 303 =(57 - 38) ÷ 19 = (74 - 41) × 91 = 244 - 145 =389 - 193 = 6 × (22 + 55) ÷ 11 = (90 - 75) ÷ 3 =999 ÷ 27 = 65 × 22 = 18 × (20 + 10) ÷ 6 = 3 × (8 + 2) ÷ 5 = 43 × 50 + 735 = 462 ÷ 42 =18 ÷ (6 + 3) × 14 = 50 × 99 + 100 = 47 × 45 + 529 =78 ÷ (18 - 5) × 23 = 340 ÷ 5 - 45 = 156 ÷ 39 + 751 = (25 + 47) × 66 = (4 + 12) ÷ 8 = 15 × (18 - 16) ÷ 1 = 13 × 36 + 438 = (90 - 29) × 18 = 14 × (8 + 2) ÷ 5 = (40 - 35) ÷ 1 = 14 ÷ (14 - 7) × 22 = 53 × 50 - 476 =19 ÷ (18 + 1) × 70 = 217 + 206 = 352 - 120 =(12 + 9) × 45 = (13 + 49) × 88 = 18 × (30 - 3) ÷ 9 = 75 ÷ 15 + 785 = 40 ÷ (1 + 9) × 12 = 56 × 9 + 334 =60 × 32 + 118 = 15 × (75 - 70) ÷ 1 = 800 ÷ 10 =38 × 3 + 809 = (55 - 52) × 90 = (16 + 29) × 38 =8 × (64 + 48) ÷ 16 = 102 ÷ 2 - 38 = (35 + 35) ÷ 14 =8 × (10 - 4) ÷ 2 = 6 × (27 - 21) ÷ 2 = 49 × 8 + 252 =27 × 162 =月日姓名:练习范围:四则运算题数:100 分秒成绩:10 × 5 + 252 = (6 + 15) ÷ 3 = 13 × (8 + 4) ÷ 2 = (7 + 1) ÷ 8 = 672 ÷ 14 + 393 = (19 - 12) ÷ 7 =16 × 45 - 312 = (16 + 49) × 37 = 422 - 264 =18 × (72 - 4) ÷ 17 = (24 - 18) ÷ 2 = (9 + 9) ÷ 18 =891 ÷ 11 - 15 = (75 - 66) × 85 = 494 ÷ 13 - 30 =6 × (13 - 8) ÷ 5 = 196 ÷ 2 - 13 = (26 - 10) ÷ 8 =(25 + 36) × 71 = 9 × (14 - 7) ÷ 7 = 208 ÷ (17 + 9) × 91 = (44 - 4) ÷ 10 = 3 × (12 + 4) ÷ 4 = (6 + 18) ÷ 6 =68 × 77 - 36 = 185 - 132 = 1 × (56 - 42) ÷ 14 = 594 ÷ 11 = 595 ÷ 35 = 356 ÷ 4 - 28 =77 × 94 + 94 = 45 ÷ (14 - 5) × 8 = (85 - 63) × 3 =12 × (8 + 12) ÷ 5 = 11 × (32 + 12) ÷ 11 = (20 - 10) ÷ 10 =900 ÷ 45 = (15 + 16) × 89 = 495 ÷ 5 - 76 =52 × 43 - 444 = 77 ÷ (6 + 5) × 28 = 949 ÷ 13 - 63 =(6 + 4) ÷ 10 = 913 ÷ 83 + 849 = 58 + 128 =48 ÷ (11 + 1) × 71 = 63 ÷ (14 - 7) × 91 = 18 × (24 - 8) ÷ 8 = (100 - 80) ÷ 20 = (60 - 40) ÷ 5 = 6 × (6 + 27) ÷ 11 = 56 ÷ (13 - 5) × 17 = 9 × (36 - 16) ÷ 5 = 138 ÷ (16 + 7) × 39 = 14 × (45 - 15) ÷ 6 = 304 ÷ 16 = 19 × (100 - 80) ÷ 20 = 19 × (15 + 35) ÷ 10 = 21 × 14 + 580 = 84 ÷ (6 + 6) × 79 = (4 + 36) ÷ 10 = 174 ÷ 2 - 82 = 7 × (6 + 9) ÷ 15 =24 × 180 = (8 + 24) ÷ 8 = 7 × (8 + 4) ÷ 3 = (20 + 28) ÷ 12 = 59 × 11 + 276 = 8 × (36 - 9) ÷ 9 =15 × (44 - 8) ÷ 9 = 9 ÷ (4 - 3) × 1 = 120 ÷ (12 + 8) × 66 = 9 × (20 - 16) ÷ 4 = 17 × (68 - 51) ÷ 17 = 3 ÷ (5 - 2) × 4 =5 × (35 - 7) ÷ 7 = 880 ÷ 20 + 925 = 175 - 118 =73 × 46 + 507 = (5 + 20) ÷ 5 = 450 - 227 =20 × 77 + 210 = 19 × 31 - 278 = 55 × 70 - 883 =(46 - 18) × 51 = 20 × 81 + 512 = 13 × (3 + 5) ÷ 8 =9 × (72 - 18) ÷ 18 = 936 ÷ 26 + 996 = (8 + 4) ÷ 12 =(57 + 57) ÷ 19 = (25 - 5) ÷ 5 = 450 + 267 =45 ÷ (12 - 3) × 69 = (40 - 10) ÷ 10 = (60 + 12) ÷ 12 = (17 + 34) ÷ 17 = (75 - 67) × 38 = 912 ÷ 12 - 51 =52 ÷ (6 + 7) × 69 =。
四年级下册四则混合运算教案及练习题
知识讲解在没有括号的算式里,只有加、减法或只有乘、除法,都要从左往右依次计算。
知识点一:【例一】一只书包20元、一本笔记本5元、一盒水彩笔18元(1)小明买了3本笔记本和1个书包,一共用去多少钱?(2)小红买2盒水彩笔,付了50元,应找回多少元?问题一:要求一共用去多少钱,先要求出什么?怎样计算?(说一说每个算式的意义)5×3=15(元)意义:15+20=35(元)意义:把两个算式合在一起列成综合算式。
5×3+20=15+20(为什么要先算乘法?)=35(元)得到:先算乘法,再算加法。
问题二:求应找回多少元。
付出的钱数-用去的钱数=找回的钱数用去的钱怎样列式?能列综合算式吗?“18×2”表示:50-18×2=50-36 (先算乘法,再算减法)=14(元)观察上面的两个算式,发现了什么?得到:算式中有乘法和加、减法,应先算乘法。
知识点二:先算什么,再计算。
560+4×2 20-15÷3小结两步混合运算的运算顺序:(在没有括号的算式里,有乘、除法和加、减法,要先算乘、除法。
)【例二】(1)象棋一副12元,围棋一副15元;(2)老师要买3副象棋和4副围棋。
数量关系:单价×数量=总价怎样才能算出买象棋和围棋一共要付多少钱?根据单价×数量=总价,要明确:用象棋的单价乘象棋的数量等于象棋的总价,围棋的单价乘围棋的数量等于围棋的总价;分别算出两种棋的总价加起来就是一共要付的钱。
(1)12×3=36(元)15×4=60(元)36+60=96(元)(2)12×3+15×4(3)15×4+12×312×3是求象棋总价,15×4是求围棋总价,求一共要付多少钱要用加法连起来。
象棋总价加围棋总价或围棋总价加象棋总价比较:12×3+15×4 15×4+12×3和复习题有什么不同?(复习题是两步计算的混合运算,这两题是三步计算的混合运算。
人教版四年级下册数学四则运算教案5篇
人教版四年级下册数学四则运算教案5篇四则混合运算应该是用来记录情境问题的步骤或解题计划的,是情境问题的另一种表述,四则混合运算式题是数字化的情境问题,所以从情境图入手是再合适不过了。
这里给大家分享一些关于人教版四年级下册数学四则运算教案,方便大家学习。
人教版四年级下册数学四则运算教案篇1教学内容:人教版四年级数学下册2——5页一、教学目标:1、熟练掌握一、二级运算单列式从左到右的运算顺序。
2、培养学生列综合算式解决实际问题的能力。
3、感受教学与生活的紧密联系。
二、教学重点、难点:1、同级运算的运算顺序。
2、发现并总结概括出没有括号的混合运算顺序。
三、教具、学具准备:主题图练习本四、教学过程(一) 创设情境,导入新课冬天你最喜欢什么运动?(堆雪人、打雪仗、滑冰、滑雪)这节课我们就来了解认识有关滑冰场情况。
(出示“冰雪天地”主题图)让学生认真观察图。
根据主题图和提示提出问题。
1、肯定学生的积极表现,引导学生回顾和本节内容相关的旧知识。
2、出示信息,多媒体展示问题。
(二) 结合情境,探究新知。
(1)天山滑雪场上午有72人,中午有44人离去,又有85人到来,现在有多少人在滑雪?A:师:根据信息你能提出什么数学问题?生:下午有多少人?生:滑雪场一共有多少人?师:你能有什么解决办法?师:引导学生交流,鼓励学生发表自己的看法。
B:给学生一定的思考时间,鼓励学生独立列算式,然后求解,师生共同总结。
C:表扬表现积极的学生,多媒体展示问题二:“冰天雪地”3天接待987人,照这样计算,6天预计接待多少人?D:请学生先进行独立思考,然后相互讨论。
E:强调算式的多样化,帮助学生理解。
例如:问题二中算式987÷3表示6天总共接待的人数,再乘以6表示6天总共接待的人数,他们的现实意义是相同的,所以两种算法都是正确的。
3、结运算规律,在没有括号的算式里,如果只有加减法或者只有除法,都要从左往右按顺序计算。
4、请学生做书中的小练习。
人教版四年级数学下册四则混合运算
人家版四年级数学斯则混合运算1、加法、减法、乘法和除法统称四则运算。
2、四则混合运算顺序:先乘除,后加减,有括号的先算括号里面的。
3、加法:一个数加上0还得原数。
减法:被减数等于减数,差是0;一个数减去0还是这个数。
乘法:一个数和0相乘,得0。
除法:0除以一个非零的数,还得0;0不能作除数。
被除数和除数相同时,商为1一、直接写出下面的得数。
(要求:两步的先画再算)0÷156= ()+0=478 24-8+12= 24-(8+12)= 7×120-()=0120+0×2= 360-420÷6= 60÷5×4= 60÷(5×4)= 25+25×20= (17+13)×3=二、脱式计算。
35×40-315÷3 150-(67+83)÷26 60+240÷(32-26)480÷(144-960÷8)45+55÷5-20 325÷13×(266-250)一、我会填1、350与170的差除以60,商是()2、一个数同0相乘,积是();0除以一个()的数,商是0。
3、小明用了4个星期把一本钢笔写字本写完,一共写了560个字。
她平均每天写()个字。
4、每瓶饮料3元,买6箱(每箱12瓶)要()元。
5、游乐园里买一张电动火车票3元,2人一起玩5元,2人分开买票贵()元。
6、小明参加800米跑步大赛,她每分钟跑了280米,跑了2分钟后,离终点还有()米。
7、轿车2小时行了140千米,照这样计算,行280千米需要()小时。
8、小红第二季度共交了水费138元,小红第二季度平均每月交了()元。
9、王亮期末考试语、数、英三科总分为286分,已知语文、数学的平均分为98分,则英语考了()分。
二、我会选择:1、135与65的和除以15与7的差,商是多少?列综合算式为()A、135+65÷15-7B、(135+65)÷15-7C、135+65÷(15-7)D、(135+65)÷(15-7)2、学校食堂买来大米850千克,运了3车,还剩100千克,平均每车运多少千克?正确的列式为()A、850÷3B、(850+100)÷3C、850-100÷3D、(850-100)÷33、师傅4天加工了52个零件,按照这样计算,加工416个零件要()天。
四年级下数学四则运算
四则运算教学目标1、知道四则运算的正确计算顺序。
2、结合实际的生活情景,能主动探索和理解含有两级运算的运算顺序,正确计算两、三步式题,能根据题目的意思熟练列出综合算式。
3、掌握有关0的特性,知道在运算过程中0不能做除数。
4、让学生在解决实际问题的过程中,培养学生的估算意识,养成认真审题、独立思考等学习习惯。
重难点1、理解四则运算的意义,掌握四则运算的运算顺序。
2、准确快速计算两、三步式题。
3、能根据题目的意思熟练列出综合算式。
3、能合理的解决简单的实际问题,掌握解决问题的策略与方法。
知识框架一、四则混合运算的规则:1、加法:把两个数合并成一个数的运算,叫做加法。
相加的两个数叫做加数,加得的数叫做和。
2、和=加数+加数 加数=和-另一个加数3、减法:已知两个数的和与其中的一个加数,求另一个加数的运算,叫做减法。
在减法中,已知的和叫做被减数,其中的一个加数叫做减数,求出的另一个加数叫做差。
4、差=被减数-减数 减数=被减数-差 被减数=减数+差5、乘法:求几个相同加数的和的简便运算,叫做乘法。
相乘的两个数叫做因数,乘得的数叫做积。
6、积=因数×因数 因数=积÷另一个因数7、除法:已知两个数的积与其中的一个因数,求另一个因数的运算,叫做除法。
在除法中,已知的积叫做被除数,其中的一个因数叫做除数,求出的另一个加数叫做商。
除法是乘法的逆运算。
8、商=被除数-除数 除数=被除数-商 被除数=除数+商 9、在有余数的除法里,被除数=商×除数+余数 10、加法、减法、乘法和除法统称四则运算。
11、在四则运算中,加法和减法统称为第一级运算,乘法和除法统称为第二级运算。
12、在没有括号的算式里,如果只有加、减法或者只有乘、除法,都要从左往右按顺序计算。
13、在没有括号的算式里,有加、减法和乘、除法,要先算乘、除法,再算加减法。
14、算式里有括号,要先算括号里面的,再算括号外面的,括号里面的算式计算顺序遵循以上的计算顺序。
四年级下册四则混合运算
四年级下册四则混合运算一、四则混合运算的概念。
1. 四则运算。
- 在数学中,四则运算是指加法、减法、乘法和除法这四种基本运算。
- 例如:2 + 3(加法),5-1(减法),4×3(乘法),12÷4(除法)。
2. 混合运算。
- 四则混合运算就是在一个算式里,包含了两种或两种以上的四则运算。
- 例如:2 + 3×4,这个算式里既有加法又有乘法。
二、四则混合运算的运算顺序。
1. 没有括号的情况。
- 先算乘除,后算加减。
- 例如:计算12 + 4×3÷2。
- 先算乘法:4×3 = 12。
- 再算除法:12÷2 = 6。
- 最后算加法:12+6 = 18。
2. 有括号的情况。
- 先算小括号里面的,再算中括号里面的(如果有),最后算括号外面的。
- 例如:计算[12+(4 - 2)×3]÷2。
- 先算小括号里的:4 - 2=2。
- 再算中括号里的乘法:2×3 = 6。
- 接着算中括号里的加法:12+6 = 18。
- 最后算括号外面的除法:18÷2 = 9。
三、四则混合运算的应用。
1. 简单的应用题。
- 例:学校图书馆有故事书120本,科技书比故事书的3倍少10本,科技书有多少本?- 分析:先算故事书的3倍,即120×3 = 360本,再减去10本,360-10 = 350本。
- 列式为:120×3 - 10=350(本)。
2. 较复杂的应用题。
- 例:小明去商店买文具,一支铅笔2元,一个笔记本5元。
他买了3支铅笔和2个笔记本,给了售货员20元,应找回多少钱?- 分析:先算出买铅笔的花费2×3 = 6元,再算出买笔记本的花费5×2 = 10元,总共花费6 + 10=16元,最后用20元减去总花费得到应找回的钱数。
- 列式为:20-(2×3 + 5×2)- 先算括号里的乘法:2×3 = 6,5×2 = 10。
四年级数学下期末复习运算定律四则混合运算
四年级数学(下)期末复习(运算定律、四则混合运算)一、填空:1、有括号的混合运算式题的运算顺序是先算( ),如果括号里既有加减法,又有乘除法,先算( ),再算( )。
2、算式645×(800-350÷35)先算( )法,再算( )法,最后算()法。
3、如果把算式258+152÷19×8的运算顺序改成先算除法,再算加法,最后算乘法,那么算式应该是_______________________4、根据500÷125=4 4+404=408 804-408=396组成一个综合算式是______________________________。
5、把两个数( )成一个数的运算,叫做加法。
6、检验378+529=907的计算是否正确,可以用加法进行验算,这种验算方法是根据加法( )律。
7、已知两个数的( )与其中一个( ),求另一个( )的运算,叫做减法。
减法是( )的逆运算。
8、求几个( )加数的( )的简便运算叫做乘法。
9、140÷5表示( )。
10、一个加数=( )○另一个加数被减数=差○减数除数=( )○( )一个因数=( )○( )11、在有余数的除法里,被除数=( )12、用字母a、b、c表示加法结合律( )用字母a、b表示乘法交换律( )用字母a、b、c表示乘法分配律( )13、一个数加上或减去( ),结果仍是原数。
一个数乘以或除以( ),结果仍是原数。
14、在除法中,( )不能作除数。
15、计算小数加减法,先把各数的( )对齐,也就是把( )上的数对齐。
16、计算小数加减法,所得数的( )部分末尾有0,一般要把0( )。
二、判断:1、求几个加数的和的简便运算叫做乘法。
()2、任何数除0都得0。
()3、52+83+48=83+(52+48)这一步计算只运用了加法交换律。
()4、因为5×6=30,所以5和6分别叫做因数。
()5、整数加法的运算定律对小数加法同样适用。
四年级数学下册四则运算教案优秀8篇
四年级数学下册四则运算教案优秀8篇则运算教案篇一四年级下册数学第一单元四则运算教案5课时第一课时:教学内容:p4例1、例2(只含有同一级运算的混合运算)教学目标:1.使学生进一步掌握含有同一级运算的运算顺序。
2.让学生经历探索和交流解决实际问题的过程,感受解决问题的一些策略和方法。
3.使学生在解决实际问题的过程中,养成认真审题、独立思考等学习习惯。
教学过程:一、引入观察主题图,根据条件提出问题。
(1)说一说图中的人们在干什么?“冰雪天地”分成几个活动区?每个区有多少人?你是怎么知道的?组织学生提问并对简单地问题直接解答。
(2)根据图中提出的信息,你能提出哪些问题,怎样解决?通过补充条件,继续提问。
1.滑冰场上午有72人,中午有44人离去,又有85人到来。
现在有多少人在滑冰?2.“冰雪天地”3天接待987人。
照这样计算,6天预计接待多少人?等等。
先小组交流,再全班交流。
提示学生可以自己进行条件的补充。
二、新授课1.小组4人对黑板上的题目进行分配解答。
引导学生对黑板上的问题进行解答,请学生在练习本上列出综合算式并进行脱式计算。
2.小组内互相说说你是怎样解答的?教师巡视并对学生的叙述进行指导。
3.全班汇报:组织全班同学进行汇报,并且互相补充,注意每步表示的意义的叙述。
(1)71-44+85=27+85=113(人)71-44表示中午44人离去后还剩多少人,在加上到来的85人,就是现在滑冰场有多少人。
(2)987÷3×6 6÷3×987=329×6 =2×987=1974(人)=1974(人)第一种方法中,987÷3算出了1天“冰雪天地”接待的人数,再乘6算出6天接待的总人数。
(实际上就是原来学习的乘除混合应用题,不知道单一量的情况下求总量,一般都是乘除混合应用题。
)第二种方法,因为是照这样计算,那么每天接待的人数可以看作是一样多的,就可以先算出6天是3天的几倍,6天接待的总人数也是3天接待的总人数的几倍。