3.6×0.42+6.4×10.2用简便运算答案
答案:2 悬赏:80 手机版
解决时间 2021-02-02 22:38
- 提问者网友：风月客
- 2021-02-02 00:46
3.6×0.42+6.4×10.2用简便运算答案
最佳答案
- 五星知识达人网友：未来江山和你
- 2021-02-02 01:40
=3.6×0.42+6.4×(0.42+9.78)
=0.42×(3.6+6.4)+6.4×(10-0.22)
=0.42×10+6.4×10-6.4×11×0.02
=4.2+64-70.4×0.02
=68.2-1.408
=66.792
=0.42×(3.6+6.4)+6.4×(10-0.22)
=0.42×10+6.4×10-6.4×11×0.02
=4.2+64-70.4×0.02
=68.2-1.408
=66.792
全部回答
- 1楼网友：神鬼未生
- 2021-02-02 03:17
3.6×0.42+6.4×10.2
=3.6×0.42+3.6x10.2+2.8x10.2
=3.6x（0.42+10.2）+28.56
=3.6x10.64+28.56
= 38.304+28.56
=66.864
=3.6×0.42+3.6x10.2+2.8x10.2
=3.6x（0.42+10.2）+28.56
=3.6x10.64+28.56
= 38.304+28.56
=66.864
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