a.2/3+5/8+1/2 b.1/3+2/6+5/9 c. 4 1/2+2 1/3+1/4 d. 3/4-2/6 e.5-6/9 f.8-12/6 g.4 7/9-4/6-2/3 h.6,3-3,75 i.8,4-3,7 j.1,7-0,56

a.2/3 + 5/8 + 1/2
=16/24 + 15/24 + 12/24
=43/24
b.1/3 + 2/6 + 5/9
=6/18 + 6/18 + 10/18
=22/18
=11/9

c. 4 1/2 + 2 1/3 + 1/4
= 9/2 + 7/3 + 1/4
= 54/12 + 28/12 + 3/12
=85/12
= 7 1/12

d.3/4 - 2/6
=9/12 - 4/12
=5/12

e.5 - 6/9
= 45/9 - 6/9
=39/9
=13/3

f. 8 - 12/6
=8 - 2
= 6

G.43/9 - 4/6- 2/3
=86/18 - 12/18 - 12/18
=62/18
=31/9

h.6,3 -3.75
=2,55

i. 8,4 - 3,7
=4,7

j.1,7 - 0.56
=1.14