Answer:
Mental Addition of 2-Digit Numbers
To add two numbers mentally, add the digits separately.
Add the tens digits and then look at the ones digits to decide what the answer ends in.
For example in 32 + 29, we add the tens digits first.
3 + 2 = 5.
Adding the ones, 2 + 9 = 11.
Step-by-step explanation:
hope it helps
