Review adding 2-digit numbers using column addition without regrouping | Maths

Starter quiz

What is the value of the digit 8 in the number 83?
- 8 ones
- 8 tens ✓
- 8 hundreds
What 2-digit number could be made using the arrow cards?
- '75' ✓
Which expression matches the Base 10 blocks representation?
- 24 + 62
- 24 + 26
- 42 + 62
- 42 + 26 ✓
Alex is trying to calculate the sum of 36 and 12 using column addition. Which column addition has he set out correctly?
- a)
- b) ✓
Alex is trying to calculate forty-five add twenty-three. Which column addition has he set out correctly?
- a)
- b)
- c) ✓
Which equations match the column addition?
- 47 + 32 = 77
- 37 + 42 = 79 ✓
- 79 = 42 + 37 ✓
- 37 = 77 + 42

Exit quiz

What is the sum in this column addition?
- '47' ✓
What is the sum in this column addition?
- '64' ✓
What ones digit is missing from this column addition?
- '1' ✓
What tens digit is missing from this column addition?
- '5' ✓
Which two addends would make this column addition correct?
- 12
- 22 ✓
- 26
- 36 ✓
Which addend would make this column addition correct?
- '33' ✓

Worksheet

Loading worksheet ...

Presentation

Loading presentation ...

Lesson Details

Key learning points

The addends are written in columns with the same value digits in the same column.
Start by adding the numbers with the smallest place value first.
Record the sum below the addends.
To find a missing part, subtract the known part from the whole.

Common misconception

Pupils may refer to adding numbers in the tens as 3 + 6 rather than 3 tens + 6 tens or 30 + 60

Encourage pupils to refer to the tens numbers as tens. In 34 + 44, we add 4 ones and 4 ones together, and then we add 3 tens and 4 tens together. This will support pupil's understanding as they progress to addition with regrouping.

Keywords

Addend - An addend is a number added to another.
Sum - The sum is the the total when numbers are added together.
Column addition - Column addition is a way of adding numbers by writing a number below another.