Tolong dibantu kak. 1. 20,8+3 1/2= 2.2 1/25 + 45%= 3. 42/48 – 1/12= 4.10 3/5 –8/6

1. 20,8+3 1/2= = 20,8 + 3,5 = 24,3
2.2 1/25 + 45%= 2,04 + 0,45 = 2,49 = 249%
3. 42/48 – 1/12= (21-2)/24 = 19/24
4.10 3/5 –8/6 = 10 + (18-40)/30
= 10 – 22/30
= 9 (30-22)/30
= 9 ⁴/15

1. 20,8 + 31/2 = 208/10 + 31/2 = 208/10 + 155/10 = 363/10 = 36 3/10

2. 21/25 + 45/100 = 84/100 + 45/100 = 129/100 = 1 29/100

3. 42/48 – 1/12 = 42/48 – 4/48 = 38/48 = 19/24

4. 10 3/5 – 8/6 = 53/5 – 8/6 = 38/30 – 40/30 = 278/30 = 9 8/30 = 9 4/15