问题
选择题
一种电子手表售价比原来降低了25%是72元.原来售价多少元?正确的列式应是( )
A.72÷25%
B.72÷(1-25%)
C.72×(1-25%)
D.72×(1+25%)
答案
72÷(1-25%);
故选:B.
一种电子手表售价比原来降低了25%是72元.原来售价多少元?正确的列式应是( )
A.72÷25%
B.72÷(1-25%)
C.72×(1-25%)
D.72×(1+25%)
72÷(1-25%);
故选:B.