Question

7-Calcule:
a) 1/2 + 4/5 =
e) 3/5 + 8/5 =
b) 2/3 + 7/3 =
f) 1/3 + 3/2 =
c) 5/6 + 1/2=
g) 23/9 + 30/3 =
h) 2/3 + 3/5 + 5/7=
d) 9/5 + 3/4 =​

Answer 1

7) a) 1/2 + 4/5

1×5+4×2/5×2

5+8/10

13/10

e) 3/5 + 8/5

3+8/5

11/5

b) 2/3 + 7/3

2+7/3

9/3 = 3

f) 1/3 + 3/2

1×2+3×3/3×2

2+9/6

11/6

c) 5/6 + 1/2

5×2+1×6/6×2

10+6/12

16/12

4/3

g) 23/9 + 30/3

23/9 + 10

23×1+10×9/9×1

23+90/9

113/9

h) 2/3 + 3/5 + 5/7

70+63+75/105

208/105

d) 9/5 + 3/4

9×4+3×5/5×4

36+15/20

51/20