12.5*(81*1.7+8.1*8.3) 要巧算!!!
答案:5 悬赏:20 手机版
解决时间 2021-02-09 10:41
- 提问者网友:未信
- 2021-02-08 17:18
12.5*(81*1.7+8.1*8.3) 要巧算!!!
最佳答案
- 五星知识达人网友:撞了怀
- 2021-02-08 18:52
=12.5x8.1x(17+8.3)
=12.5x(8+0.1)x25.3
=(100+1.25)x25.3
=2530+31.625
=2561.625
=12.5x(8+0.1)x25.3
=(100+1.25)x25.3
=2530+31.625
=2561.625
全部回答
- 1楼网友:不甚了了
- 2021-02-08 22:20
布吉岛
- 2楼网友:旧脸谱
- 2021-02-08 21:59
切,简单哦娃纸
12.5*[8.1(0.17+8.3)]
后面的自己算吧,够简便了
12.5*[8.1(0.17+8.3)]
后面的自己算吧,够简便了
- 3楼网友:英雄的欲望
- 2021-02-08 21:47
12.5×(81×1.7+8.1×8.3)
=12.5×(8.1×17+8.1×8.3)
=12.5×8.1×25.3
=12.5×(8+0.1)×25.3
=(100+1.25)×25.3
=2530×(1.25×(8+8+8+0.8+0.5)
=2561.625
=12.5×(8.1×17+8.1×8.3)
=12.5×8.1×25.3
=12.5×(8+0.1)×25.3
=(100+1.25)×25.3
=2530×(1.25×(8+8+8+0.8+0.5)
=2561.625
- 4楼网友:酒安江南
- 2021-02-08 20:13
12.5*(8.1*1.7+8.1*8.3)
=12.5*8.1*(1.7+8.3)
=12.5*8.1*10
=12.5*81
=12.5*80+12.5
=1000+12.5
=1012.5追问是12.5×(81×1.7+8.1×8.3),不是12.5×(8.1×1.7+8.1×8.3)!好吗?追答那样没有简算方法
=12.5*8.1*(1.7+8.3)
=12.5*8.1*10
=12.5*81
=12.5*80+12.5
=1000+12.5
=1012.5追问是12.5×(81×1.7+8.1×8.3),不是12.5×(8.1×1.7+8.1×8.3)!好吗?追答那样没有简算方法
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