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32x12.5x2.4简便计算

960

如图

12.5x32x0.7 =(12.5×8)×(4×0.7) =100×2.8 =280

12.5×32×2.5 =12.5×(2×2×8)×2.5 =12.5×2×2.5×2×8 =25×5×8 =25×40 =1000 另一种算法 12.5×32×2.5 =12.5×8×4×2.5 =(12.5x8)X(4x2.5) =100x10 =1000

12.5×32×0.9 =12.5×8×(4×0.9) =100×3.6 =360

12.5x32x0.125 =12.5x(4x8)x0.125 =(12.5x4)x(8x0.125) =50x1 =50 运用乘法结合律。 希望能帮到你!

(2)7.2X(36.3-16.3) (3)100X0.57+2X0.57

0.78Ⅹ32x12.5x2.5 =0.78×4×8×12.5×2.5 =0.78×(4×2.5)×(8×12.5) =0.78×10×100 =7.8×100 =780

2.5x0.32x12.5 =2.5x0.4x(0.8x12.5) =1x10 =10 如有帮助请采纳, 如对本题有疑问可追问,Good luck!

32x0.25x12.5x0.2x5 =(4x0.25)x(8x12.5)x(0.2x5) =1x100x1 =100

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