3/4+4/5= 1/4+5/6= 1/2+7/8= 2/3+4/7=

A. ¾+4/5= 15/20+16/20=31/20=1 ¹¹/20
B. 6/24+20/24=26/24=1 ¹/12

3/4 + 4/5
= 15/20 + 16/20
= 31/20
= 1 11/20

1/4 + 5/6
= 3/12 + 10/12
= 13/12
= 1 1/12

1/2 + 7/8
= 4/8 + 7/8
= 11/8
= 1 3/8

2/3 + 4/7
= 14/21 + 12/21
= 26/21
= 1 5/21

semoga bermanfaat
maaf kalo salah