Question

8分之7减3分之1减8分之1加3分之2简便算法

Answer 1

7/8 - 1/3 -1/8 + 2/3
= ( 7/8 - 1/8 ) + ( 2/3 - 1/3 )
= 6/8 +1/3
= 3/4 + 1/3
= 9/12 + 4/12
= 13/12