Add Two Digit Numbers Using Tens and Ones

45 + 23 = _______.

What is 56 + 29?

• 85

• 75

• 87

• 95

Which strategy can be used to add 45 + 28?

• Counting on

• Counting back

• Using a number line

• All of the above

72 + 19 = _______.

What is the sum of 56 and 38?

• 85

• 90

• 94

• 95

89 + 56 = _______.

The math operation that combines two or more numbers to find the total is called _______.

When adding two-digit numbers, you always add the tens first, then the ones.

• True

• False

Using base-ten blocks, add these two numbers.

63 + 28 =