Question

Whats 2/5 +3/10 i need to knows

Answer 1

2/5 can be rewritten as 4/10; this means 4/10 + 3/10 = 7/10.

So your answer is 7/10 !

Answer 2

You need a common denominator. The LCM of 5 and 10 is 10, so use 10 as your common denominator.

2/5 + 3/10 =

= 4/10 + 3/10

= 7/10