问题
选择题
计算:27m÷9m÷3的结果为( )
A.32m-1
B.3m-1
C.3m+1
D.32m+1
答案
27m÷9m÷3,
=(33)m÷(32)m÷3,
=33m÷32m÷3,
=33m-2m-1,
=3m-1.
故选B.
计算:27m÷9m÷3的结果为( )
A.32m-1
B.3m-1
C.3m+1
D.32m+1
27m÷9m÷3,
=(33)m÷(32)m÷3,
=33m÷32m÷3,
=33m-2m-1,
=3m-1.
故选B.