jawab yah please bsk dikumpul aku mohon yah

a.2/3+1/5=10/15+3/15=13/15
b.2 1/6 +1 2/3=2 1/6 + 1 4/6=3 5/6
c.3/4-3/7=21/28-12/28=9/28
d.2 1/4-1 2/5=2 5/20-1 8/20=1 25/20- 1 8/20=17/20

a. 2/5 x 3/4=6/20=3/10
b.3 1/6 x 1 2/3=19/6 x 5/3=95/18=5 5/18
c.1/4 : 5/12=1/4 x 12/5=3/5
d.1 1/8 : 1 3/16=9/8 x16/19=18/19