Tolong bantuin jawab yah...

1 ) 3/5 + 2. 1/4 - 3/20
= 12/20 + 9/4 - 3/20
= 12/20 + 45/20 - 3/20
= 57/20 - 3/20
= 54/20
= 2. 14/20
= 2. 7/10 ✅

2 ) 5/6 × 1. 4/7 ÷ 3/4
= 5/6 × 11/7 × 4/3
= 55/42 × 4/3
= 220/126
= 1. 47/63 ✅

3 ) 4,6 m - 2,8 m
= 46/10 m - 28/10 m
= 18/10 m
= 1,8 m ✅

4 ) Sisa kelereng
= 1 - 2/7
= 7/7 - 2/7
= 5/7
= 5/7 × 42 butir
= 30 butir ✅

5 ) 10. 1/2 liter ÷ 5
= 21/2 ÷ 5
= 21/2 × 1/5
= 21/10 liter
= 2. 1/10 liter ✅