小数四则混合运算专项练习题有答案

小数混合运算专项练习276题（有答案）

(1) 0.11 X 1.8+8.2 X 0.11 (42)0.25 X 3.2 X 1.25 (84) 6.48 - 3.2- 2.5

(2) 2.34 X 99+2.34 (43)9.99 X 1.01 (85) 1.2 X 7.6+7.6 X 6.8.

(3) 5.4 - 2.7 X 0.8 (44) 4.63 X 1.4+46.3 X 0.86 (86)(9.4 - 5.8 )X 2.07

(4)132X 101 (45)17.5 - 0.8- 12.5 (87)12.54 - 4.56 - 3.44 -

1.54

(5) 6.25 - 1.25 - 0.8 (46)0.9+9.9+99.9+999.9 .(88)(9.36 X 5+9.36+9.36 X

2)

(6) 2.5 X 16.(47) 2.9X 99+2.9 X 1.25

(7) 6.33 X 101 - 6.33 (48)25 X 11.2X 4 (89)7.236- 0.18 - 14.3X

0.02 .

(49)23.25- 6.75 - 3.25.(90)9.6-0.4X 0.25

(8) 1.56 X 1.7+0.44 X 1.7 (50)125 X 3.2X 2.5 (91)29.7 -( 5.85 - 0.65)

(9) 1.8 X [ ( 3.41 - 2.9 )-(51) 3.6X 10.1 (92)7.4 X 9.9

0.03] (52) 5.8X 2.7+0.58 X 73 (93) 3.84 - 2.7X 0.64 (10)0.125 X 32X 2.5 .(53) 3.6+6.4X 1.8 (94)8.68 - 8.68-0.56X 0.5

(11) 1.258 X 18.5 - 0.258 X(54)(1.48+3.02) - (3.6 X

0.5)(95) 4.7X 4.7+4.7+4.3 X 4.7.

18. 5 (96) 2.72 - [ ( 8.2 - 6.5 )X

(12)8.48 - 0.8 X 0.9 (55)(36.7 - 4.9 )X 101 -

31.8.0.5] ;

(13) 1.25 X 2.4 (56) 6.33 X 101 - 6.33 (97)9.12+9.12 X 9 - 60.2 ;

(14) 5.85 -( 1.3+0.5 )X 6.(57)35.6 - 5 X 1.73 (98)28.4 - 0.4 - 0.25 ;

(15)17.17 - 6.8 - 3.2 - 6.17 (58) 1.6X 55.4- 55.4X 0.6 (99)27.36 - 27.36 - 7.6 .

(59)17.68- 5.2+2.7X 1.5 .(100) 3.25 X 0.45+6.75 X 0.45 (16) 5.4 X [ (1.3+2.15 ) - 0.2] (60) 1.08 X 0.8 - 0.27 (101)31.5 - 24.5-3.5

(61)102 X 0.45 (102)7.5X 102

(17)8.4 - 0.6+8.4 - 0.4 (62)22.78 - 1.25 - 0.8 (103) 6.3+3.7 X 2.8.

(18)16.8 X 10.1 (63)0.34 X 101 - 0.34 .(104) 2.15+8.73+1.27+7.85

(19)10.9 - 0.9 - 0.2+1.8 (64)0.125X 32X 2.5 (105)11.87-( 8.2+1.87)

(20) 1.25 X 3.2 X 0.25 .(65)0.8X 6.3- 0.8X 3.8 (106) 5.42 - 3.87 - 1.13

(21) 1.36+4.85+2.64+6.15 (66)504 - 3.2X 2.08 (107) 4.38 - 1.56+0.62 - 0.44

(22)98.5 - 2.5 - 4 (67)(20 - 0.8 X 9)X 5.7 (108)0.4 X 270 X 2 .

(23) 5.4 - [2.5 X (3.7 - 2.9 )] (68) 2.4X 1.5+3.6 - 1.5 (109)(40+1.25) X 8

(24)0.8 X( 4 - 3.68 )- 0.01 (69)7.38 - 5.14+3.62 - 2.86 (110)(12.5 - 0.05)X 8

(25)83.7 - 12.83 - 0.17 (70)0.12 X 1.8+8.2 X 0.12 (111) 2.6X 8.5+8.5 X 7.4

(26) 5.96+13 X( 3.2 - 3.12 )(71) 5.4-[0.51 - (1.2- 1.03)] (112)9.9X 6.9- 6.9X 3.9

(27) 4.32 - 2.4 X 1.7 ;(72)[(8.1 - 5.6)X 0.9 - 1.05] (113) 5.6 X 99+5.6

(28)16.2 X 4.5+3.8 X 4.5 ;-0.04.(114) 2.5X( 1.9+1.9+1.9+1.9 )

(29)9.05 - 3.86 - 3.14 ;(73)10.8 - 0.8-( 0.35+0.05)

(30)7.28+0.72 - 0.9 .(115)7.2- 1.25-8.

(31) 4.32+5.43+6.68 (74)8X [1 -( 2.3 - 2.25)] (116)52.4 -( 15+0.6) - 1.6

(32)17.17 - 6.8- 3.2 (75) 2.64 X 9.9+0.264 (117)9.87 X 99+9.87

(33) 5.29X 9+5.29 (76) 4.52+0.61 + 1.39+6.48 (118)46.8 - 0.9- 0.4

(34)16.8X 10.1 (77) 4.27 -( 1.96 - 1.73 )(119) 5.5X 17.3+6.7 X 5.5.

(35) 2.74X 9.5+5 X 0.274 (78)(294.4 - 19.2 X 6)-(120)99 X 4.2+4.2

(36)0.36+9.6 - 3.2.(6+8)(121)0.25 X 1.25 X 3.2

(37) 3.75X 25+6.25 X 25 (79)12.5 X 0.76 X 0.4 X 8X(122) 6.4 X 14+15 X 6.4+6.4

(38)25.46 - 8.23 - 1.76 2.5 (123)(1.3+1.3 X 0.125 X 8)-

(39) 2.9+7.1 X 10 (80) 4.98+8.02 X 2.5 (80 - 77.4)

(40) 1.25 X 32 X 0.25.(81)60.8 - 40.8 - 2.5 (124)4X( 25+2.5+0.25)- 111

(41)15.68-( 7.78 - 4.32)-(82)0.8X 69.6X 12.5

2.3

2

(83) 4.98 X 99+4.9