43+43X39的简便方法

Question

我知道，不敢确定

Answer 1

43+39*43
=(39+1)*43
=40*43
=1720本回答被提问者采纳

Answer 2

43*（1+39）=43*40=1720追问

一样一样的说~

Answer 3

43x（1+39）=42x40=1680

Answer 4

=43*（1+39）
=43*40
=1720

Answer 5

43+43x39
=43x1+43x39
=43x(39+1)
=43x40
=1720