(1╱2+2╱3-3╱4)÷1╱48简便算法,7.7×5╱5╱8＋7又7╱10÷8╱3简便算法,今天急用.

(1╱2+2╱3-3╱4)÷1╱48简便算法,7.7×5╱5╱8＋7又7╱10÷8╱3简便算法,今天急用.
(1╱2+2╱3-3╱4)÷1╱48简便算法,7.7×5╱5╱8＋7又7╱10÷8╱3简便算法,今天急用.

(1╱2+2╱3-3╱4)÷1╱48简便算法,7.7×5╱5╱8＋7又7╱10÷8╱3简便算法,今天急用.
(1╱2+2╱3-3╱4)÷1╱48
=(1╱2+2╱3-3╱4)×48
=1/2×48+2/3×48-3/4×48
=24+32-36
=56-36
=20
7.7×5╱8＋7又7╱10÷8╱3
=7.7×5╱8＋7.7×3/8
=7.7×（5/8+3/8）
=7.7