Column Addition and Carrying Over

The video tutorial explains how to use column addition to add two-digit and one-digit numbers. It provides three examples: adding 17 and 6, 15 and 9, and 18 and 7. Each example demonstrates the importance of lining up numbers correctly, starting from the right-hand side, and carrying over tens when necessary. The video emphasizes the step-by-step process of column addition, ensuring learners understand each part of the calculation.

What is the first step in column addition?

• Align the numbers in columns

• Ignore the ones column

• Add the tens first

• Start from the left-hand side

Why is it important to align numbers correctly in column addition?

• To make it look neat

• To make the addition faster

• To ensure accurate addition

• To avoid carrying over

What is the key concept to remember when performing column addition?

• Ignore the tens

• Align numbers in rows

• Start from the right

• Start from the left

In the example 17 add 6, what is the sum of the ones column?

• 11

• 12

• 14

• 13

What should you do if the sum of the ones column is exactly 10?

• Carry over 1 to the tens column

• Write 10 in the ones column

• Ignore the carry over

• Subtract 1 from the tens column

What do you do with the tens when the sum of the ones column is greater than 9?

• Ignore them

• Subtract them from the total

• Carry them over to the tens column

• Add them to the ones column

In the first example, what is the sum of the tens column after carrying over?

• 1

• 2

• 3

• 4

What is the number sentence for the second example?

• 18 add 7

• 15 add 9

• 16 add 8

• 17 add 6

In the second example, what is the sum of the ones column?

• 14

• 13

• 16

• 15

After carrying over the tens in the second example, what is the final sum?

• 24

• 25

• 23

• 26