tolong guys besok di kumpulkan tulis dgn caranya

10.
40/9 × (6 4/20 - 2 15/20) + 5/12
= 40/9 × 3 9/20 + 5/12
= 40/9 × 69/20 + 5/12
= 138/9 + 5/12
= 1656/108 + 45/108
= 1701/108
= 15.75
= 15 3/4

11.
8 × 7½ = 8 × 7.5
= 60 kg

5% busuk
5/100 × 60 = 3 kg
[60-3=57]

Tetangga yg dapat :
57 ÷ 3 = 19 orang