Use near doubles within 10 | Maths | Quizalize & Oak National Academy

Starter quiz

Which sentence describes what the bar model is representing?

Double 2 is 4

Double 4 is 8

Double 3 is 6 ✓
What is being shown on this number frame?

Double 2 is 4 ✓

Double 4 is 8

2 + 2 = 4 ✓
Half of 8 is 3 True or False?

True
False ✓
What halving equation is represented by the bar model?

Half 8 is 4

Half 6 is 3

Half 3 is 6

Half 4 is 2 ✓
Tick all the correct statements.

If I know double 4 is 8, then I know half of 8 is 4 ✓

If I know double 3 is 6, then I know half of 3 is 6

If I know half of 10 is 5, then I know double 5 is 10 ✓
There were 6 birds in the tree. Half of them flew away. How many birds flew away?

6

5

4

3 ✓

Exit quiz

Complete the sentence. If double 4 is 8, then 4 + 5 is one __________

more ✓

less

half
Which sentence describes the representations.

Double 1 is 2, add 1 is 3

Double 2 is 4, add 1 is 5 ✓

Double 4 is 8, add 1 is 9
Which sentence describes the representations?

Double 3 is 6, subtract 1 is 5

Double 4 is 8, subtract 1 is 7 ✓

Double 2 is 4, subtract 1 is 3
Which double facts could help to solve 3 + 4 = ?

2 + 2

3 + 3 ✓

4 + 4 ✓

5 + 5
Whose sum is 3?
There were 4 bananas and 5 apples in the bowl. How many pieces of fruit were there in total?

7

8

9 ✓

10

Worksheet

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Lesson Details

Key learning points

We can use double facts to solve near-double calculations.
We can double the smaller addend and add 1 If 4 + 4 = 8, then 4 + 5 is one more than 8, which is 9
We can double the larger addend and subtract 1 If 5 + 5 = 10, then 4 + 5 is one less than 10, which is 9

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/ doubling - To become twice as many.
Near-double - A near-double is a number close to a double.