Question

What is 1/10 + 1/4 + 1/5+2/15? A.41/60 B 6/41 C 11/12 D 1/7

Answer 1

1/10 + 1/4 + 1/5 + 2/15.

LCM of 10, 4, 5, and 15 = 60

1/10 = 6/60 1/4 = 15/60 1/5 = 12/60 2/15 = 8/60

= 6/60 + 15/60 + 12/60 + 4/60 = (6 + 15 + 12 + 8) / 60 = 41/60

Option A.

Answer 2

an easy common denominator is 60 bc 15*4=60 and everything else can equal 60 too so:
6/60+ 15/60+ 12/60+ 8/60 = 41/60 (you only add the numerator numbers) usually you would reduce the end result too but 41 is a prime number so you cant