Question

78×37+22×37他的简便运算是多少他的答案是3700一？

Answer 1

78x37+22x37
=37x(78+22)
=37x100
=3700

Answer 2

=(78+22)×37
=100×37
=3700 乘法分配律。

Answer 3

=(78+22)×37
=100×37
=3700

Answer 4

78×37+22×37
=37×(78+22)
=37×100
=3700