Answer
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Step-by-step explanation
The key to adding or subtracting fractions with different denominators is to express the fractions in a form where the two denominators have the same value using Lowest Common Multiple (LCM)
Question 1
![(3)/(4)+(2)/(5)=(15)/(20)+(8)/(20)=(15+8)/(20)=(23)/(20)](https://img.qammunity.org/2023/formulas/mathematics/college/eiavj5j1an2ijc9vow80rxf7q0mdcdydzb.png)
Question 2
![1+(9)/(5)=(5)/(5)+(9)/(5)=(5+9)/(5)=(14)/(5)](https://img.qammunity.org/2023/formulas/mathematics/college/i77hlvxzx7xoqg7c70tnay61dfu00dbl2o.png)
Question 3
![(13)/(7)+(3)/(2)=(26)/(14)+(21)/(14)=(26+21)/(14)=(45)/(14)](https://img.qammunity.org/2023/formulas/mathematics/college/fova2opd369d2uqsvgmj8hzyeja970rwik.png)
Question 4
![(5)/(8)-(1)/(7)=(35)/(56)-(8)/(56)=(35-8)/(56)=(27)/(56)](https://img.qammunity.org/2023/formulas/mathematics/college/qwfhk0z2v4xgaxrm9l0bzdmt02iw61gduq.png)
Hope this Helps!!!