Completează cu fracția care lipsește

4/8= 9/8-5/8
9/3=7/3+2/3
7/5=4/5+3/5
1/4=8/4-7/4
2/9=1/9+1/9
6/8=4/8+2/8
5/10=9/10-4/10
31/100+34/100+65/100=1
51/100-17/100+68/100=1