Finding number bonds for numbers up to 20

Finding number bonds for numbers up to 20

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Lesson details

Key learning points

  1. In this lesson, we will be using number bonds and looking for patterns for numbers within 20. We will look at partitioning and part whole modelling.

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This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

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5 Questions

Q1.
If I know that 6 + 2 = 8, then I know
16 + 2 = 8
Correct answer: 8 - 6 = 2
8 + 2 = 6
Q2.
6 + 2 = 8 - Which equation shows 'one more'
16 + 2 = 18
5 + 2 = 7
60 + 20 = 80
Correct answer: 7 + 2 = 9
Q3.
6 + 2 = 8 - Which equation shows commutativity?
16 + 2 = 8
Correct answer: 2 + 6 = 8
8 - 2 = 6
8 - 6 = 2
Q4.
6 + 2 = 8 - Which equation shows the inverse
16 + 2 = 18
60 + 20 = 80
Correct answer: 8- 2 = 6
Q5.
6 + 2 = 8 - Which equation shows changing the tens place value?
16 + 2 = 8
16 + 2= 18
60 + 2 = 80
Correct answer: 60 + 20 = 80

4 Questions

Q1.
There will be more number bonds for 7 than 8
Correct answer: No
Yes
Q2.
There will be fewer number bonds for 5 than 7
No
Correct answer: Yes
Q3.
Each number can be split into 1 whole and 2 parts
No
Correct answer: Yes
Q4.
4 + 5 and 5 +4 count as the same number bond
no
Correct answer: Yes

Lesson appears in

UnitMaths / Number sense and exploring calculation strategies