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39÷1.5%0.15×0.2的计算过程

25.97 解析: 39÷1.5-0.15×0.2 =13÷0.5-0.15×(1/5) =26-0.03 =25.97

1.5Ⅹ2.9+0.15简便计算 =1.5x29+1.5x0.1 =1.5x(2.9+0.1) =1.5x3 =4.5

解:X+0.5=15÷1.5 X+0.5=10 X=10-0.5 X=9.5

7.2÷15+0.3÷1.5简便 解: 7.2÷15+0.3÷1.5 =0.48+0.2 =0.68

0.15×2.1+1.5×7.9 =1.5x0.21+1.5x7.9 =1.5x(0.21+7.9) =1.5x8.11 =1.5x8+1.5x0.1+1.5x0.01 =12+0.15+0.015 =12.165.

4.05÷0.15-2.4×1.5 =27-3.6 =23.4

解:4.8÷0.15+2.4x1.5 =4.8x100/15+2.4x1.5 =480/15+(2+0.4)x1.5 =(450+30)/15+3+0.6 =30+2+3+0.6 =35.6

0.42×1.5+14.4×0.15+1.5 =0.42×1.5+1.44×1.5+1.5 =(0.42+1.44+1)×1.5 =2.86×1.5 =4.29

2.6×1.5+0.15×74 =0.15×26+0.15×74 =0.15×(26+74) =0.15×100 =15

18÷1.5-0.5×0.3 =18÷3/2-0.15 =18×2/3-0.15 =12-0.15 =11.85

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