题目内容
【题目】计算下面各题,能简算的要简算.
4.05÷[1.8×(3.36﹣2.86)]
19.75﹣6.45﹣3.55
5.3×0.82﹣0.82×0.3
【答案】4.5;9.75;4.1
【解析】
(1)4.05÷[1.8×(3.36﹣2.86)]
=4.05÷[1.8×0.5]
=4.05÷0.9
=4.5;
(2)19.75﹣6.45﹣3.55
=19.75﹣(6.45+3.55)
=19.75﹣10
=9.75
(3)5.3×0.82﹣0.82×0.3
=(5.3﹣0.3)×0.82
=5×0.82
=4.1
练习册系列答案
相关题目