Add 2-digit numbers using column addition | Maths | Quizalize & Oak National Academy

Starter quiz

What is represented by the digit 5 in 56?
- 5
- 50 ✓
- 500
What is represented by the digit 2 in 256?
- 2
- 20
- 200 ✓
Which calculation matches the base ten blocks representation?
- 123 + 54
- 133 + 44
- 134 + 45
- 133 + 54 ✓
Which calculation matches the base ten blocks representation?
- 133 + 144
- 134 + 143
- 135 + 143 ✓
- 145 + 134
Which calculation matches the column addition?
- 124 + 131
- 214 + 131
- 224 + 121
- 224 + 131 ✓
Which two numbers are being added in the column addition?
- two hundred and three
- two hundred and thirty ✓
- two hundred and sixty
- two hundred and six ✓

Exit quiz

Which addition calculation is represented by the base ten blocks?
- 42 + 36
- 32 + 46 ✓
- 33 + 46
- 32 + 44
Which two addends are added in this column addition?
- twenty-four ✓
- thirty-four
- forty-three ✓
- sixty-seven
What is the missing sum in the column addition?
- '63' ✓
What is the missing sum in the column addition?
- '78' ✓
What ones digit is missing from this column addition?
- '2' ✓
What is the missing addend in this column addition?
- '20' ✓

Worksheet

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Presentation

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Lesson Details

Key learning points

The addends are written in columns with the same value digits in the same column
Start by adding numbers with the smallest place value first
Record the sum below the addends

Common misconception

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

Encourage them to refer to the tens numbers as tens, and use the language appropriately. In 34 + 44, we add 4 and 4 together and then we add 30 and 40 together. This will support their reasoning as they progress in this unit.

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.