甲数比乙数的80%少20,甲数是40,乙数是( ) A.25 B.30 C.75 D.90
问题描述:
甲数比乙数的80%少20,甲数是40,乙数是( )
A. 25
B. 30
C. 75
D. 90
答
(40+20)÷80%,
=60÷0.8,
=75.
答:乙数是75.
故选:C.