1.七分之二加五分之三
=10/35+21/35
=31/35
2.五分之四减十分之三
=8/10-3/10
=1/2
3.十二分之十一减四分之三加六分之一
=1/6+1/6
=1/3
4.25分之12加4分之1
=48/100+25/100
=73/100
5.4分之3加12分之5减六分之五
=7/6-5/6
=1/3
1.七分之二加五分之三
=10/35+21/35
=31/35
2.五分之四减十分之三
=8/10-3/10
=1/2
3.十二分之十一减四分之三加六分之一
=1/6+1/6
=1/3
4.25分之12加4分之1
=48/100+25/100
=73/100
5.4分之3加12分之5减六分之五
=7/6-5/6
=1/3