小数混合运算专项训练
1、解方程。
(1)5x=450 (2)12(6-x)=42
(3)1.2×6+4x=12 2、用简便方法计算。
(1)0.25 ×3.2×12.5 (3)0.25×44 3、用脱式计算。
(1)2.6+1.4×1.5-1.5 (3)2.6+2.4×(1.4-1.05)
(4)8.5x-x=22.5
(2)36×10.1
(4)22.2×4+17.8×4
(2)(37-3.6÷4.8)÷12.5
(4)15.6÷16×(0.25+1.25)
30.8÷[14-(9.85+1.07)] [60-(9.5+28.9)]÷0.18
2.881÷0.43-0.24×3.5 20×[(2.44-1.8)÷0.4+0.15]
28-(3.4+1.25×2.4) 2.55×7.1+2.45×7.1
777×9+1111×3 (31.8+3.2×4) ÷ 5 0.×25×7.8+2.2 36.25÷4.25×9.9 24÷2.4-2.5×0.8 671×15-974 19.4×6.1×2.3 18.1×0.92+3.93 0.78+5.436+1 9. 9x5÷6+5÷6
0.8×[15.5-(3.21+5.79)]
31.5×4÷(6+3)
2÷2.5+2.5÷2 5180-705×6 (4121+23)÷7
469×12+1492 5.67×0.2-0.62
0.4×0.7×0.25
4. 8× 5÷4+1÷4
÷4x8÷9-1÷3
10. 3
14. 31x5÷6-5÷6 16. 5÷9x18-14x2÷7
20. 3x2÷9+1÷3 35. 95÷(-45)
36. 178-145÷5×6+42 7.2÷0.8-1.2×5
6.5×(4.8-1.2×4) 2.55×7.1+2.45×7.1 (31.8+3.2×4)÷5 0.×25×7.8+2.2 194-.8÷1.8×0.9 5180-705×6 (4121+23)÷7 469×12+1492 19.4×6.1×2.3 18.1×0.92+3.93
28-(3.4+1.25×2.4)
777×9+1111×3
31.5×4÷(6+3)
2÷2.5+2.5÷2
36.72÷4.25×9.9
24÷2.4-2.5×0.8
671×15-974
405×(3213-31)
5.67×0.2-0.62
0.043×24+0.875
0.4×0.7×0.25 0.78+5.436+1
4.07×0.86+9.12 240×78÷(1-115)
1437×27+27×563 〔75-(12+18)〕÷15
2160÷〔(83-79)×18〕325÷13×(266-250) 58870÷(105+20×2) 81432÷(13×52+78) (947-599)+76× [192-(+38)]×67 (947-599)+76× 2.881÷0.43-0.24×3.5 31.8 3.2×4)÷5 36.72÷4.25×9.9
280+840÷24×5
85×(95-1440÷24) 1437×27+27×563
[37.85-(7.85+6.4)] ×30
36×(913-276÷23) 81432÷(13×52+78)
60-(9.5+28.9)÷0.18
0.8×〔15.5-(3.21+5.79)〕
194-.8÷1.8×0.9
3.416÷(0.016×35)
0.8×[(10-6.76)÷1.2] (6.8-6.8×0.55)÷8.5
0.12× 4.8÷0.12×4.8 (58+37)÷(-9×5)
812-700÷(9+31×11) 156×[(17.7-7.2)÷3]
(3.2×1.5+2.5)÷1.6 85+14×(14+208÷26)
120-36×4÷18+35 9.72×1.6-18.305÷7
3.2×(1.5+2.5)÷1.6 (58+37)÷(-9×5)
(6.8-6.8×0.55)÷8.5 0.12× 4.8÷0.12×4.8
(3.2×1.5+2.5)÷1.6 120-36×4÷18+35
15-10.75×0.4-5.7 347+45×2-4160÷52
(58+37)÷(-9×5) [(7.1-5.6)×0.9-1.15] ÷2.5
(3.2×1.5+2.5)÷1.6 5.4÷[2.6×(3.7-2.9)+0.62]
12×6÷(12-7.2)-6 3.2×6+(1.5+2.5)÷1.6
(3.2×1.5+2.5)÷1.6 120-144÷18+35
347+45×2-4160÷52 (58+37)÷(-9×5)
95÷(-45) 812-700÷(9+31×11)
120-36×4÷18+35 (6.8-6.8×0.55)÷8.5
0.12× 4.8÷0.12×4.8 (31.8+3.2×4)÷5 0.×25×7.8+2.2 194-.8÷1.8×0.9 5180-705×6 (4121+23)÷7
469×12+1492
405×(3213-31)
0.8×〔15.5-(3.21+5.79)〕
31.5×4÷(6+3)
2÷2.5+2.5÷2
36.72÷4.25×9.9
24÷2.4-2.5×0.8
671×15-974
0.8×[(10-6.76)÷1.2]
19.4×6.1×24
5.67×0.2-0.62
18.1×0.92+3.93
24+0.875×99
0.4×0.7×0.25
0.75×102
100-56.23
31.50+160÷40
(58+370)÷(-45)
32.120-144÷18+35
33.347+45×2-4160÷52
34(58+37)÷(-9×5)
35.95÷(-45)
36.178-145÷5×6+42 420+580-×21÷28
37.812-700÷(9+31×11) (136+)×(65-345÷23)
38.85+14×(14+208÷26) 120-36×4÷18+35
(58+37)÷(-9×5) (6.8-6.8×0.55)÷8.5
0.12× 4.8÷0.12×4.8 (3.2×1.5+2.5)÷1.6
3.2×(1.5+2.5)÷1.6 31.50+160÷40
(58+370)÷(-45) 32.120-144÷18+35
33.347+45×2-4160÷52 34(58+37)÷(-9×5)
35.95÷(-45) 36.178-145÷5×6+42
420+580-×21÷28 812-700÷(9+31×11)
(136+)×(65-345÷23) (284+16)×(512-8208÷18)
120-36×4÷18+35 (58+37)÷(-9×5)
(6.8-6.8×0.55)÷8.5 0.12× 4.8÷0.12×4.8
(3.2×1.5+2.5)÷1.6 (23.2×(1.5+2.5)÷1.6
45.6-1.6÷4= 5.38+7.85-5.37=
46.7÷0.8-1.2×5= 6-1.19×3-0.43=
47.6.5×(4.8-1.2×4)= 0.68×1.9+0.32×1.9
297×999 1983×21+21×3017
(0.123+123) ×1009 34×24+3481
0.8×0.196+0.094 105+5×57
32.47×23+27 39.01×18.3-901
76.5+2-2×184 49+23×14
31×99 52×99+52 25×32×125
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