8分之1+6.875=0.125+6.875=77分之5+7分之2 =18分之1+7分之5+6.875+7分之2 =8
1/8+5/7+6.875+2/7=(1/8+6.875)+(5/7+2/7)=(0.125+6.875)+1=7+1=8
8分之1+7分之5+6.875+7分之2 =1/8 + 5/7 + 6又7/8 +2/7=7+1=8
=1/8+5/7+55/8+2/7=(5/7+2/7)+(1/8+55/8)=1+7=8哈哈