72×39+72怎样简便运算?要用梯等式!

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/25 15:57:21
72×39+72怎样简便运算?要用梯等式!
x)37:

72×39+72怎样简便运算?要用梯等式!
72×39+72怎样简便运算?
要用梯等式!

72×39+72怎样简便运算?要用梯等式!
72×39+72
=72x(39+1)
=72x40
=2880

72×39+72
=72*(39+1)
=72*40
=2880

(72*39)+72
=2808+72
=2880

72×(39+1)
=72×40
=2880

72x39+72
=72x(39+1)
=72x40
=2880