Sagot :
Answer:
1. 7/12
2. 7/8
3. 17/20
4. 31/44
5. 34/35
Step-by-step explanation:
1. 2/8=1/4
1/4 + 1/3= (3·1)+(4·1)/4·3=7/12
2. 1(4)/2(4)=4/8
4/8 + 3/8=4+3/8=5/8
3. 1/4 + 3/5
1(5)/4(5) + 3(4)/5(4)
5/20 + 12/20
5+12/20=17/20
4. 5/11 +1/4
(4·5)+(11·1)/11·4
20+11/44=33/44
5. 4/7 + 2/5
(4·5)+(7·2)/7·5
20+14/35= 34/35
ANSWER:
1. 2/8 + 1/3
6/24 + 8/24 = 14/24 or 7/12
2. 1/2 + 3/8
4/8 + 3/8 = 7/8
3. 1/4 + 3/5
5/20 + 12/20 = 17/20
4. 5/11 + 1/4
20/44 + 11/44 = 31/44
5. 4/7 + 2/5
20/35 + 14/35 = 34/35