Jawabannya pake cara

1.2per5 + 3per6=(12+15)/30=27/30=9/10

2.5per4 – 1per3=(15-4)/12=11/12

3. 1 3per2 – 4per5=5/2-4/5=(25-8)/10=17/10=1 7/10

4.5per7 : 8=5/7x 1/8=5/56

1. 2/5 + 3/6 = 12/30 + 15/30 = 17/30
2. 5/4 – 1/3= 15/12 – 4/12 = 11/12
3. 1 3/2 – 4/5 = 1 15/10 – 8/10 = 1 7/10
4. 5/7 : 8 = 5/7 × 1/8 = 5/56