Question

What is the answer to 3 + 4 1/10

Answer 1

First you can change 3 to 10/10 so that they can have the same denominator. Now, since you do that the number is now 2. 

Now, do 10/10-1/10=9/10.
After do 2-4=-2.
So, your final answer is -2 9/10.