题目
计算下列各题,能简算的要简算.
(1)
2.9﹣0.46﹣0.54
(2)
1.25×32×0.25
(3)
5.3×0.82﹣0.82×0.3
(4)
4.97×[2.46÷(5.58﹣5.28)]
答案: 解:2.9﹣0.46﹣0.54 =2.9﹣(0.46+0.54) =2.9﹣1 =1.9
解:1.25×32×0.25 =1.25×(8×4)×0.25 =(1.25×8)×(4×0.25) =10×1 =10
解:5.3×0.82﹣0.82×0.3 =(5.3﹣0.3)×0.82 =5×0.82 =4.1
解:4.97×[2.46÷(5.58﹣5.28)] =4.97×[2.46÷0.3] =4.97×8.2 =40.754