28x35+72x72如何用乘法分配律

28x35+72x72如何用乘法分配律
2024-11-22 18:10:21
推荐回答(3个)
回答(1):

28x35+72x72
=28x35+72x(35+37)
=28x35+35x72+72x37
=35x(28+72)+2664
=3500+2664
=6164

供参考。

回答(2):

原式=14×70+72×70+72×2
=(14+72)×70+144
=86×70+144
=6020+144
=6164.

回答(3):

28x35+72x72
=28x35+72x35+72x35+72x2
=35x(28+72+72)+144
=6164