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12.5X1.36X0.8简便计算

12.5×0.8×0.96

=12.5×0.8×0.96 =10×0.96 =9.6

12.5x8.7x0.8 =(12.5x0.8)x8.7 =10x8.7 =87

12.5x0.8+1.25x0.8-1.25 =1.25×8+1.28+0.8-1.25 =1.25×(8-0.8-1) =1.25×8.2 =1.25×8+1.25×0.2 =10+0.5 =10.5

12.5x(80+0.8)简便运算如下 12.5x(80+0.8) =12.5x80+12.5x8 =1000+10 =1010

12.5X(8+0.8) =12.5×8+12.5×0.8 =100+10 =110

12.5x2.5x0.8x4 =(12.5x0.8)x(2.5x4) =10x10 =100

(0.8+8)x12.5 =12.5x(1-0.2)+12.5x(10-2) =(12.5x1-12.5x0.2)+(12.5x10-12.5x2) =10+100 =110

3.6÷3.6×12.5×0.8=10

两边同时减去12得,-12

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