tolong bgt ya kakak kakak

7.2 1/4 +2 1/3 + 2 1/2=9/4 + 7/3 + 5/2
=27/12 + 28/12 +30/12=85/12=7 1/12

8.4 1/2 + 3/8 + 2 1/4=9/2 + 3/8 + 9/4
=36/8 + 3/8 + 18/8=57/8= 7 1/8

9.2 1/3 + 2 5/9 3 3/6=7/3 + 23/9 + 21/6
=42/18 + 46/18 +63/18=151/18=8 7/18

10.3 1/4 + 4/6 + 5 5/12=13/4 + 4/6 +65/12
=39/12 + 8/12 + 65/12=112/12=9 4/12=9 1/3