简便方法计算7.5*2.3+1.9*2.5+12.5*0.4
答案:3 悬赏:20 手机版
解决时间 2021-02-11 09:35
- 提问者网友：戎马万世
- 2021-02-10 23:28
简便方法计算7.5*2.3+1.9*2.5+12.5*0.4
最佳答案
- 五星知识达人网友：杯酒困英雄
- 2021-02-10 23:36
7.5*2.3+1.9*2.5+12.5*0.4
=2.5*3*2.3+1.9*2.5+2.5*5*0.4
=2.5*(6.9+1.9+2)
=2.5*10.8
=2.5*(10+0.8)
=2.5*10+2.5*0.8
=25+2
=27
=2.5*3*2.3+1.9*2.5+2.5*5*0.4
=2.5*(6.9+1.9+2)
=2.5*10.8
=2.5*(10+0.8)
=2.5*10+2.5*0.8
=25+2
=27
全部回答
- 1楼网友：玩家
- 2021-02-11 02:11
=2.5x3x2.3+1.9x2.5+2.5x5x0.4
=2.5x(6.9+1.9+2)
=2.5x10.8
=2.5x(10+0.8)
=2.5x10+2.5x0.8
=25+2
=27
答:........
=2.5x(6.9+1.9+2)
=2.5x10.8
=2.5x(10+0.8)
=2.5x10+2.5x0.8
=25+2
=27
答:........
- 2楼网友：迟山
- 2021-02-11 00:56
27
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