问题
选择题
77×77×77×77×77×77×77等于( )
A.497
B.749
C.78
D.87
答案
77×77×77×77×77×77×77=7(7+7+7+7+7+7+7)=749.
故选:B.
77×77×77×77×77×77×77等于( )
A.497
B.749
C.78
D.87
77×77×77×77×77×77×77=7(7+7+7+7+7+7+7)=749.
故选:B.