0.64×125×2.5 简便算法
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0.64×125×2.5 简便算法
0.64×125×2.5 简便算法
0.64×125×2.5 简便算法
0.64×125×2.5
=0.8x0.8x125x2.5
=0.8x125x2.5x0.8
=100x2
=200
0.64×125×2.5
=0.8×125×0.8×2.5
=100×2
=200
0.64×125×2.5
=(0.08×125) × (8×2.5)
=10×20
=200
0.64×125×2.5
=0.08×8×125×2.5
=(0.08×125)×(8×2.5)
=10x20=200