6.5×6.2 0.65×38巧算。
答案:4 悬赏:80 手机版
解决时间 2021-01-19 17:57
- 提问者网友：心牵心
- 2021-01-19 02:05
6.5×6.2 0.65×38巧算。
最佳答案
- 五星知识达人网友：鸽屿
- 2021-01-19 03:31
6.5×6.2 +0.65×38
=6.5×6.2 +0.65x10×38/10
=6.5×6.2+ 6.5×3.8
=6.5x（6.2+3.8）
=6.5x10=65
=6.5×6.2 +0.65x10×38/10
=6.5×6.2+ 6.5×3.8
=6.5x（6.2+3.8）
=6.5x10=65
全部回答
- 1楼网友：长青诗
- 2021-01-19 06:51
6.5x6.2
=(6+0.5)x(6+0.2)
=(6+0.5)x6+(6+0.5)*0.2
=6x6+0.5x6+6x0.2+0.5x0.2
=36+3+1.2+0.1
=40.3
0.65x38同理
0.65x38=0.65*30+0.65*8=19.5+5.2=24.7
=(6+0.5)x(6+0.2)
=(6+0.5)x6+(6+0.5)*0.2
=6x6+0.5x6+6x0.2+0.5x0.2
=36+3+1.2+0.1
=40.3
0.65x38同理
0.65x38=0.65*30+0.65*8=19.5+5.2=24.7
- 2楼网友：妄饮晩冬酒
- 2021-01-19 05:51
=6.5*6.2+6.5*3.8=6.5*（6.2+3.8）=6.5*10=65。
- 3楼网友：走死在岁月里
- 2021-01-19 04:51
6.5X6.2+0.65X38
=6.5X(6.2+3.8)
=6.5X10
=65
=6.5X(6.2+3.8)
=6.5X10
=65
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