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12.5x0.96x0.8简便运算

=12.5*0.8*0.96=10*0.96=9.6

12.5X0.96X8=(12.5X8)X0.96=100X0.96=96

12.5X0.96X8=(12.5X8)X0.96=100X0.96=96

12.5*0.96*0.8=12.5*0.8*0.96=10*0.96=9.6

2.4x1.02+12.5x0.96x0.8=2.4x(1+0.02)+12.5x0.8x0.96=2.4+0.48+10x0.96=2.88+9.6=2.88+(10-0.4)=12.88-0.4=12.48

12.5x(0.83x0.8) =(12.5*0.8)*0.83 =(10*0.8+2*0.8+0.05*0.8)*0.83 =(8+1.6+0.4)*0.83 =10*0.83 =8.3

展开全部12.5*1.36*0.8=12.5*0.8*1.36=10*1.36=13.6

12.5*1.36*0.8=12.5*0.8*1.36=10*1.36=13.6

12.5*8.43*0.8=8.43*(12.5*0.8)=8.43*10=84.3

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

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