To calculate each of these expressions, we need to find a common denominator first.
1) 2/7 + 3/5Common denominator = 35(2/7) (5/5) = 10/35(3/5) (7/7) = 21/35Adding these together, we get:10/35 + 21/35 = 31/35
2) 3/4 - 3/5Common denominator = 20(3/4) (5/5) = 15/20(3/5) (4/4) = 12/20Subtracting these, we get:15/20 - 12/20 = 3/20
3) 1/3 + 1/6Common denominator = 6(1/3) * (2/2) = 2/6(1/6) = 1/6Adding these together, we get:2/6 + 1/6 = 3/6 = 1/2
Therefore, the results of the expressions are:1) 2/7 + 3/5 = 31/352) 3/4 - 3/5 = 3/203) 1/3 + 1/6 = 1/2
To calculate each of these expressions, we need to find a common denominator first.
1) 2/7 + 3/5
Common denominator = 35
(2/7) (5/5) = 10/35
(3/5) (7/7) = 21/35
Adding these together, we get:
10/35 + 21/35 = 31/35
2) 3/4 - 3/5
Common denominator = 20
(3/4) (5/5) = 15/20
(3/5) (4/4) = 12/20
Subtracting these, we get:
15/20 - 12/20 = 3/20
3) 1/3 + 1/6
Common denominator = 6
(1/3) * (2/2) = 2/6
(1/6) = 1/6
Adding these together, we get:
2/6 + 1/6 = 3/6 = 1/2
Therefore, the results of the expressions are:
1) 2/7 + 3/5 = 31/35
2) 3/4 - 3/5 = 3/20
3) 1/3 + 1/6 = 1/2