Найди значения выражений: 1/3 + 1/6; 1/2 + 1/3; 3/5 − 1/10; 1/12 + 5/6; 1/3 + 1/4; 1/3 + 2/5; 1/2 − 1/4; 8/7 − 1; 1/4 − 1/5; 1/2 + 3/7; 3/4 − 1/8; 1/5 + 1/6; 4/15 + 2/5; 7/10 − 1/2; 1/3 − 1/4.

Для сложения и вычитания дробей приводим их к общему знаменателю.

1. \(\frac13+\frac16=\frac26+\frac16=\frac12\).
2. \(\frac12+\frac13=\frac36+\frac26=\frac56\).
3. \(\frac35-\frac1{10}=\frac6{10}-\frac1{10}=\frac12\).
4. \(\frac1{12}+\frac56=\frac1{12}+\frac{10}{12}=\frac{11}{12}\).
5. \(\frac13+\frac14=\frac4{12}+\frac3{12}=\frac7{12}\).
6. \(\frac13+\frac25=\frac5{15}+\frac6{15}=\frac{11}{15}\).
7. \(\frac12-\frac14=\frac24-\frac14=\frac14\).
8. \(\frac87-1=\frac87-\frac77=\frac17\).
9. \(\frac14-\frac15=\frac5{20}-\frac4{20}=\frac1{20}\).
10. \(\frac12+\frac37=\frac7{14}+\frac6{14}=\frac{13}{14}\).
11. \(\frac34-\frac18=\frac68-\frac18=\frac58\).
12. \(\frac15+\frac16=\frac6{30}+\frac5{30}=\frac{11}{30}\).
13. \(\frac4{15}+\frac25=\frac4{15}+\frac6{15}=\frac{10}{15}=\frac23\).
14. \(\frac7{10}-\frac12=\frac7{10}-\frac5{10}=\frac15\).
15. \(\frac13-\frac14=\frac4{12}-\frac3{12}=\frac1{12}\).