tolong jawab no 1-5 pakai cara

2. 6.24 cm × 4.7 cm = 293.28 ÷ 2 = 146.64 cm2
5. 2.75 × 2 = 5.50
9.50 ÷ 5.50 = 1.72 = pakan hanya bisa dipakai utk 1 hari