0.26乘以9.8减0.74乘以0.2的简便运算、

分类: 作业答案 • 2022-01-09 18:03:21

问题描述：

答

0.26乘以9.8减0.74乘以0.2
=0.26x9.8-0.74x0.2
=0.26x9.8-（1-0.26）x0.2
=0.26x9.8-0.2+0.2x0.26
=0.26（9.8+0.2）-0.2
=0.26x10-0.2
=2.6-0.2
=2.4
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