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Norzkiegarupa111viz

Answer:

1. 8/9

2. 7/8

3. 8/15

4. 5/7

5. 9/10

Step-by-step explanation:

1. 1/3 + 5/9

1(3)/3(3) + 5/9

3+5/9=8/9

2. 2/4 + 3/8

2(2)/4(2) + 3/8

4+3/8=7/8

3. 2/6 + 1/5

2(5)/6(5) + 1(6)/5(6)

10+6/30= 16/30, by 2

8/15

4. 2/7 + 3/7

2+3/7=5/7

5. 2/5 + 1/4 + 2/8

2/5 + [1(2)/4(2) +2/8]

2/5 + [2+2/8]

2/5 +4/8

2/5 +2/4

2(4)/5(4) + 2(5)/4(5)

8+10/20

18/20, by 2

9/10

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