New
New
Year 1

# Use knowledge of doubles to calculate near-doubles

I can use knowledge of doubles to calculate near-doubles.

New
New
Year 1

# Use knowledge of doubles to calculate near-doubles

I can use knowledge of doubles to calculate near-doubles.

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## Lesson details

### Key learning points

1. Knowing double facts helps you to calculate near-doubles.
2. If 2 + 2 is equal to 4, then 2 + 3 is equal to one more than 4 which is 5

### Common misconception

Children could try to apply this idea to other near-double facts that may be more easily solved using other strategies.

0 + 1 and 1 + 2 are near-doubles, but these are more easily solved using the 'one more'/ 'one less' strategy. Explore this together before leading children to the most efficient strategy for calculating.

### Keywords

• Double - To become twice as many.

• Near-double - A near-double is a number close to a double.

### Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

## Starter quiz

### 6 Questions

Q1.
halving
Q2.
What number would complete this bar model?
Q3.
Tick all the correct statements.
Correct answer: Half of 8 is 4
Correct answer: Half of 4 is 2
Double 4 is 2
Correct answer: Double 2 is 4
Q4.
What is the missing number? Half of is 3
8
7
5
Q5.
Who is correct?
Sam
Q6.
Sam is 8 years old. She is double the age of her brother. How old is her brother?
3 years old
1 years old
2 years old

## Exit quiz

### 6 Questions

Q1.
What near double is the representation showing?
6 + 5
5 + 4
Q2.
What near double is the representation showing?
3 + 4
4 + 5
Q3.
Which of these double facts would help to solve this near-double problem? 2 + 3 =
1 + 1
5 + 5
Q4.
Finish the sentence. Near doubles always have
Q5.
What is the missing number in this bar model?