Review column addition and identify the addends and sum | Maths

Starter quiz

What calculation is represented by the Base 10 blocks?
- 24 + 13 =
- 34 + 13 =
- 34 + 23 = ✓
- 34 + 33 =
Which numbers in the bar model are the addends?
- 41 ✓
- 25 ✓
- 66
Which number in the bar model is the sum?
- '66' ✓
What is the missing addend?
- '30' ✓
Which numbers are the addends in this equation? 76 = 22 + 54
- 76
- 22 ✓
- 54 ✓
What is the sum is this equation? 99 = 55 + 44
- '99' ✓

Exit quiz

What are the addends in this column addition?
- 43 ✓
- 22 ✓
- 65
What is the sum in this column addition?
- '65' ✓
Alex represents the column addition as a bar model to describe the parts and whole. Which bar model shows the correct position of 83?
Look at the column addition. Which statements are correct?
- 37 is an addend. ✓
- 89 and 52 are both addends.
- The sum is 89 ✓
- 52 is the sum.
Which equations match the column addition?
- 52 + 37 = 89 ✓
- 52 + 89 = 37
- 89 = 57 + 32
- 89 = 37 + 52 ✓
Which equations match the column addition?
- 33 + 44 = 77
- 34 + 43 = 77 ✓
- 77 = 34 + 43 ✓
- 43 = 77 + 34

Worksheet

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Lesson Details

Key learning points

The addends are written in columns with the same value digits in the same column.
One addend is written above the other one.
The sum is recorded underneath the addends with the same value digits in the same column.

Common misconception

Pupils may misidentify the sum and addends within column addition.

Emphasise the use of the 'equals' symbol within the column addition. This is where the sum appears. It is important that pupils understand commutativity and that the addends can appear in any order and will still result in the same sum.

Keywords

Addend - An addend is a number added to another.
Sum - The sum is the the total when numbers are added together.
Equation - An equation shows that one number or calculation is equal to another.
Column addition - Column addition is a way of adding numbers by writing a number below another.