The answer would be 43
Step-by-step explanation:
2 tens would equal 20 because your adding 10 + 10, this is the first step of the problem.
Now you want to break down 23 ones. 20 ones is equal to 2 tens. So that would be 20 and the left over 3 ones would just stay 3 ones. So now you want to add 20 + 20 and than add 3