Question

70乘7加65乘14用简便计算怎么做

Answer 1

解:

原式

=(35x2)x7+65x14

=35x14+65x14

=(35+65)x14

=100x14

=1400

方法:

转化后利用乘法分配律实现简便计算。

Answer 2

70×7 + 65×14=70×7 + 65×(2×7)
=70×7 + 65×2×7
=7×(70 + 65×2)
=7×(70 + 130)
=7×200
=1400