动脑筋,简便算.(递等式,不要竖式计算)(答得好,悬赏一百分) 25x32x125 37x62+37x39-37

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动脑筋,简便算.(递等式,不要竖式计算)(答得好,悬赏一百分)25x32x12537x62+37x39-37动脑筋,简便算.(递等式,不要竖式计算)(答得好,悬赏一百分)25x32x12537x62+

动脑筋,简便算.(递等式,不要竖式计算)(答得好,悬赏一百分) 25x32x125 37x62+37x39-37
动脑筋,简便算.(递等式,不要竖式计算)(答得好,悬赏一百分) 25x32x125 37x62+37x39-37

动脑筋,简便算.(递等式,不要竖式计算)(答得好,悬赏一百分) 25x32x125 37x62+37x39-37
25x32x125
=25*4*8*125
=(25*4)*(8*125)
=100*1000
=100000
37x62+37x39-37
=37*(62+39-1)
=37*100
=3700

第一道:(25*4)*(8*125)=100*1000=100000
第二道:37*(62+39-1)=3700

25x32x125
=25x4x8x125
=100x1000
=100000
37x62+37x39-37
=37x(62+39-1)
=37x100
=3700

25x32x125 =25x4x8x125 =100x1000=100000
37x62+37x39-37=37x62+37x39-37x1=37x(62+39-1)=37x100=3700
应该很清楚了