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9.12x0.8简便运算

9.12*0.8 =9.12*8*0.1 =72.96*0.1 =7.296

9.12*0.8=(9+0.12)*8=9*8+0.12*8=72+0.96=72.96

0.8*9+0.8*0.12=7.296

9*0.8+0.12*0.8

9.12*0.8=7.296 望采纳,谢谢

你好,这道题不需要用到简便算法,直接相乘即可.12.5*0.8=10 望采纳.

12.5x27x0.8=(12.5*0.8)x27=10x27=270

2.5x12.9x0.8=2.5*0.8*12.9=2*12.9=25.8

所谓简便计算,就是把显而易见或者容易计算的两个数,按照规则移到最近的位置优先计算.12.5x0.96x0.8=12.5x0.8x0.96=10x0.96=9.6

展开全部=12.5*0.8*0.9=10*0.9=9

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