Addition with Regrouping Two-Digit Numbers

when you want to add or subtract 2-digit number always start with the ones digits

REmember

​Step 1: Make sure that the numbers are aligned with its place value.

​ 24

​ + 38

​Step 2: Add the numbers in Ones place value first.

​

24

​ +38

​

​4+8=12

​ Remember:

12 has 1 Tens and 2 Ones.

​ 1 should be written within the place value of Tens and 2 should be written in the place value of Ones.

​ 1

24

​ 38

​ 2

​Step 3: Add the numbers in the Tens place value.

​ 1

​ 24

​ + 38

​ 62

Multiple Choice

What is the sum of these two numbers?

• 80

• 85

• 45

• 87

Multiple Choice

• 81

• 45

• 60

• 71

Double Digit Addition

Multiple Choice

Do I need to regroup in this addition problem?

• Yes

• No

Multiple Choice

Do I need to regroup in this addition problem?

• yes

• no

3 5 + 7 2 = ?​

4 0 + 4 9 = ?

6 2 + 1 6 = ?

2 4 + 3 4 = ?

​

4 2 + 2 3 = ?

5 5 + 6 3 = ?​