Kak tolong jawab soal memecahkan masalah sehari-hari melibatkan penjumlahan dan pengurangan pecahan

1. 12 7/8 - 8 3/18 =
KPK = 8 = 2³. 18 = 2×3². KPK = 2³ × 3² = 72
12 63/72 - 8 12/72 = 4 51/72 Ton

2. 35 ½ - 18 ¾ =
KPK = 2 = 1×2. KPK = 2² = 4
4 = 2²
35 2/4 - 18 ¾ = 16 ¾

3. 38 ⅝ - 21 4/6 KPK = 2³×3 = 24
KPK = 8 = 2³.
= 6 = 2×3
38 15/24 - 21 16/24 = 16 23/24