Question

Add / subtract the following pairs of unlike fraction with explanation

Answer 1

Answer:

a.LCM of 10 and 15 is 30

so 3/10=9/30 and 5/15= 10/300

now add 9/30+15/30=24/30

b.LCM of 4 and 3 is 12

so 3/4=9/12 and -1/3= -4/12

now add 9/12-4/12=5/12

c.LCM of 7 and 5 is 35

so 4/7=20/35 and -2/5=-14/35

now add 20/35+-14/35=6/35

d.LCM of 4 and 20 is 20

so 3/4=15/20 and 7/20

now add 15/20+7/20=22/20