14.4x5.2x3.2 0.89X99+0.89 4.28*5.5-3.5 求简易便算，谢谢！
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解决时间 2021-11-09 10:41
- 提问者网友：最美的风景
- 2021-11-08 21:04
14.4x5.2x3.2 0.89X99+0.89 4.28*5.5-3.5 求简易便算，谢谢！
最佳答案
- 五星知识达人网友：怙棘
- 2021-11-08 21:26
14.4x5.2x3.2
=14.4x（5+0.2）x3.2
=（14.4x5+14.4x0.2）x3.2
=（72+2.88）x3.2
=74.88x(3+0.2)
=74.88x3+74.88x0.2
=224.64+14.976
=239.616
0.89X99+0.89
=0.89x(99+1)
=0.89x100
=89
=14.4x（5+0.2）x3.2
=（14.4x5+14.4x0.2）x3.2
=（72+2.88）x3.2
=74.88x(3+0.2)
=74.88x3+74.88x0.2
=224.64+14.976
=239.616
0.89X99+0.89
=0.89x(99+1)
=0.89x100
=89
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