题目内容
【题目】计算下面各题能简算的要简算
18.9﹣18.9÷1.4
7.96×9.9
8.52×9.9+0.852
(8.46﹣9÷1.5)×2.1.
【答案】5.4;78.804;85.2;5.166
【解析】解:(1)18.9﹣18.9÷1.4
=18.9﹣13.5
=5.4
(2)7.96×9.9
=7.96×(10﹣0.1)
=7.96×10﹣7.96×0.1
=79.6﹣0.796
=78.804
(3)8.52×9.9+0.852
=8.52×9.9+8.52×0.1
=8.52×(9.9+0.1)
=8.52×10
=85.2
(4)(8.46﹣9÷1.5)×2.1
=(8.46﹣6)×2.1
=2.46×2.1
=5.166
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