(1)20×80%+1.5,
=16+1.5,
=17.5;
答:这个数是17.5.
(2)10×(1+20%)÷25%,
=10×1.2×4,
=48;
答:48的25%比10多20%.
(3)20÷40%-20×40%,
=50-8,
=42.
答:甲、乙两个数相差42.
(1)20×80%+1.5,
=16+1.5,
=17.5;
答:这个数是17.5.
(2)10×(1+20%)÷25%,
=10×1.2×4,
=48;
答:48的25%比10多20%.
(3)20÷40%-20×40%,
=50-8,
=42.
答:甲、乙两个数相差42.