78×125×5简便计算
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78×125×5简便计算78×125×5简便计算78×125×5简便计算78×125×5=80×125×5-2×125×5=50000-1250=48750=(80-2)x125x5=80x125x5
78×125×5简便计算
78×125×5简便计算
78×125×5简便计算
78×125×5
=80×125×5-2×125×5
=50000-1250
=48750
=(80-2)x125x5=80x125x5-2x125x5=10000x5-125x10=50000-1250=48750
78×125×5
=(80-2)×125×5
=(80×125)×5-(2×5)×125
=1000×5-10×125
=50000-1250
=48750