Question

6.3X5.7+3.7X5.7怎样算简便就怎样算

6.3X5.7+3.7X5.7怎样算简便就怎样算怎样分析才能理解

Answer 1

=（6.3+3.7）x5.7
=10x5.7
=57

Answer 2

乘法分配律，提取公因式5.7
原式=5.7x（6.3+3.7）
=5.7x10
=57

Answer 3

乘法分配律，提出5.7