Question

77ⅹ91-6‘7ⅹ91的简便方法？

Answer 1

77×91-67×91
=(77-67)×91
=10×91
=910

Answer 2

简便计算如下：
77x91-67x91
=（77-67）x91
=10x91
=910
望采纳，谢谢

Answer 3

77×91-67×91的简便方法为：91×（77-67）=91×10=910。