小学数学毕业分类训练:计算
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小学数学毕业分类训练:计算
经一、直接写出得数。
567+398= 4+7.6= 3.18 + 6.82 = 365-198 = 1-0.1 = 2-0.42 =
9991-1999 = 21.5-16.07 = 17×8 = 30×20 = 37×3 = 24×5 =
0.3×4 = 1×0.1 = 0.3×40 = 4×25% = 1.25×8 = 100×0.15% =
3.14×8% = 6÷8 = 1÷0.1 = 1÷1% = 2.4×8 = 68÷0.4% =
1.2÷0.3 = 0.056÷6 = 6464÷32 = 8.2 + 0.54 + 0.46 = 203-0.13-0.87 = 17×25×4=
2.5×
3.2×1.25 = 400÷25÷8=
4.02-3.5+0.98 = 1÷1.25×0.8 =
1×999 + 999×999 = 4.9×9 + 4.9= 7.8×11-7.8 = 6.13-3.52 + 4.87-6.48 = 5÷5-1÷5 =
7.5×2.3 + 3.1×2.5 = 4×(0.7+1.8)= 1.25×17.6+36.1÷0.8+2.63×12.5 =
215 + 315 = 56 + 23 = 8.2 + 15 = 2.25 + 134 = 12 + 20% = 113 - 23
= 13 - 14 = 0.5 - 13 = 214 - 0.25 = 56 ×34 = 4113 ×13 = 49 ×4.5 = 0×279
= 15 ÷5 = 8÷18 = 15÷56 ÷5 = 35 ÷60% = 1÷ 418 = 734 + 25 + 0.6= 413 -0.375-158
= 1.25×32×14 = 45 ÷35 ÷45 = 259 -56 + 49 = 333÷111112 = 37×5681 = 0.375 + 7×38
= 1+1÷119 = 89 -78 ×0= 34 ÷12 -1= 13 + 23 ÷23 ×13 = 1÷(3110
-3.09)= 1-13 ÷13 + 13 = 0.9×114 + 9.1÷45 = 100×0.1-1÷25 = 4÷14 + 14 ×4= (316 + 219 )×1819
= (0.18+ 910 )÷9= (19 - 136 )×9= (6.75-534 )÷212 = 4517 -(3517 + 0.73)= 3718 ×(34
-0.75)= 0÷(1+
172 )= (2-25 ÷0.4)×(1-37 )= [1.9-1.9×(1.9-1910 )]÷0.38= 二、用简便方法计算
12.5×56 1450-499 125×16×0.5 17.09-3.63-6.37
1999+1999×99 2.83+3.3+0.17+7 1.25×4×.8×0.25 23×4.2+0.23×580
9.9×8.4+8.4-8.4×0.9 3.35×8.4×2+6.7×1.6 (2.5-2.5×0.6)÷0.4
1.25×(8+0.8)+89
2.5×(19+19+19+19) 18920 ÷9 2930
×29
127 -56 - 16 8512 -334 -2.25 857 -4.65-3720 12.28-538
-3.625
25.125-235 -17.4 15 ×11-15 1.25×27 ×8×14 1.75+435 +10.4+314
1556 -6.28- 3.72+416 99×0.75+ 14 ×99 34 ×125 +1.4×14
6.75×225 + 42.5×0.24-2.4 35×(35 -27 ) (56 + 59 )×145
5.73-(223 + 1.73) 24×(512 + 38 -16 ) 12 ×(1÷12 )÷12 (38 + 127 )×8 + 1927
(16 + 19 -112 )×4×9 161320 -(937 + 6.65) (915 -1012 ×47 )÷115 525 ×(34 + 25 )÷214
4.5-(114 +12 )- 1.75
5.5×[3411 ÷(413 - 247 )+ 211 ] 34 + 23 -14 + 13 23 ×2÷23
×2
78 ×123 + 78 ×213 534 ×0.4+ 25 ×5.25-40% 86116 ×1617 + 117 ×86116
三.求未知数x 。
3x +4.5 = 6.9 4.5x +1.3x = 17.4 x + 6=10 + 0.6x 5x -1.6 = 0.9 83 -16x = 3
20 - 0.4x=41.8 5.2x -1.3x=1.56 12.8-2.4x = 4×(x + 2) 19 + 3x -x = 20
8x -32×5 = 400 6×1.5 + 5x = 12 2×3 + 8x = 42÷5 36×4-8x = 56
5×(6 + x )= 12×4 (140-x )×16 = 480 50.5 :x = 2.5 :20
x 7 =15% x 27 = 149 320 :18% = 6.5x
12.8x = 40.25 0.34 = x 0.5
33 = 0.4x 0.82 = 2x 3x + 1.2 = 412 613 + 4x = 756 3x -135 = 12
416 x -614 = 7.5 325 -5x = 0.6 3.6-23 x = 2320 x -14 x = 38 x ×35 = 20×34
x ÷25 = 2.5 x :34 = 2 :114 x :34 = 9.6 :20% 3.2 :x = 8 :113 412 :x = 0.3:13
10 :x = 4.5 :45 312 :x = 134 :0.6 112 :23 = x :8 212 :313
= x :0.2
4.5 :310 = x :115 0.3 :18 = x :123 13 :25 = 0.75 :x 0.8 :512
=0.24 :x
0.16 :25 = 825 :x 13 :120 = 179
:x 2x -1.65+2.35=7 7.5:x =24:12
8X -5.5X=1 0.36∶8=X ∶25 4÷23 X = 25
8(x -2)= 2(x +7)