Lesson Steps:

There are two numbers with two digits each.
Units digit of 10 : 0
Tens digit of 10 : 1

Add the units digits of both numbers : 0 + 0 = 0
Add the tens digits of both numbers : 1 + 1 = 2

Combine the tens digit and units digit to get the answer: 20.

Answer:

20

Subject: Math
Topic: Addition