1.A.3/7+2/4= B. 1/2+4/5=C. 1/7+2/9=D. 2/9+1/6=

1.a 3/7 + 2/4 = 12/28 + 14/28= 26/28= 13/14
B. 1/2 + 4/5= 5/10+8/10= 13/10
C.
D. 2/9+1/6= 4/18+3/18=7/18
Maaf kalau salah

1. A. 3/7 + 2/4.
= 12 + 14 / 28.
= 26 / 28.
= 13 / 14.

B. 1/2 + 4/5.
= 5 + 8 / 10.
= 13 / 10.
= 1 3/10.

C. 1/7 + 2/9.
= 9 + 14 / 63.
= 23 / 63.

D. 2/9 + 1/6.
= 4 + 3 / 18.
= 7 / 18.

~ Semoga bermanfaat ~
Jadikan yang terbaik!!