请问:120×45+450×88这题怎样用简便方法计算？

Question

如题所述

Answer 1

1、120×45+450×88
=120×45+45×880
=（120+880）×45
=1000×45
=45000
2、乘法分配律：（a+b）x c=axc+bxc

Answer 2

=120×45+45×10×88
=45×（120+880）
=45×1000
=45000

Answer 3

120×45+450×88
=12×450+450×88
=450×(12+88)
=450×100
=45000

Answer 4

120×45+450×88
=120×45+45×880
=(120+880)×45
=1000×45
=45000

Answer 5

120×45+450×88
=120×45+45×880
=(120+880)x45
=1000x45
=45000