问题 计算题
计算下面各题。(能简算的要简算)
(1)72.5÷0.5÷20(2)4.28×0.4+4.28×1.6
(3)9.2+7.6+10.5(4)1.25×7×0.8×2
答案

(1)72.5÷0.5÷20

 =72.5÷(0.5×20)

 =72.5÷10

 =7.25(2)4.28×0.4+4.28×1.6

 =4.28×(0.4+1.6)

 =4.28×2

 =8.56

(3)9.2+7.6+10.5

 =16.8+10.5

 =27.3

    

(4)1.25×7×0.8×2

 =1.25×0.8×7×2

 =1×7×2

 =14 

单项选择题
单项选择题