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Verified Answer :

it is 3 if you estimate because it is less then 3 and a half'

I hope this helps you

1)

2/5+2/3

2.3/5.3+2.5/3.5

6/15+10/15

16/15

2)

4.8+1/8-3.2/4.2

33/8-6/8

27/8

3)

1.3+1/3-1/4

4/3-1/4

4.4/3.4-1.3/4.3

16/12-3/12

13/12

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