Question

2.55×1.5+1.5+6.45×1.5简便计算？

Answer 1

2.55×1.5+1.5+1.5×6.45
=（2.55+1+6.45）×1.5
=10×1.5
=15

Answer 2

2.55*1.5+1.5+6.45*1.5
=1.5*（2.55+1+6.45）
=1.5*10
=15

Answer 3

根据乘法结合律得：
2.55×1.5+1.5+6.45×1.5
=1.5×（2.55+1+6.45）
=1.5×10
=15

Answer 4

原式＝（2.55十1十6.45）x1.5
＝10x1.5＝15

Answer 5

2.55x1.5十1.5十6.45x1.5
＝（2.55十1十6.45）x1.5
＝10x1.5
＝15