1. 計算下面各題，怎樣簡便就怎樣算。 2X125X8X5 125X897X8 35X10
2X125X8X5
=125X8X2X5
=1000X10
=10000
125X897X8
=125X8X897
=1000X897
=897000
35X101
=35X(100+1)
=35X100+35X1
=3535
973X5X2
=973X10
=9730
68X99
=68X(100-1)
=68X100-68
=6800-68
=6732
請樓主採納！！！！！
2. 125x87x8的簡便計算
可以運用乘法交換律和結合律。
125×87×8
=125×8×87
=1000×87
=87000
3. (98x125)x8的簡便計算
原式=125x8x98
=1000x98
=9800