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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