Doing fraction problems

The tablet

12 + 12 + 8 + 8= 30cm

The forest

9 + 5 + 11 + 7 = 32cm

The photo

14 + 14 + 18 + 18= 64cm

The school

260 + 190 + 210 + 110 + 90= 860m

The birthday card

28 + 20 + 14 + 14 = 76

The block
3 + 1 + 1/2 + 1/2= 5