Year 1
Year 1

To find double and half within 20

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Lesson details

Key learning points

  1. In this lesson, we will double numbers by adding the same number to itself and halve even numbers by sharing equally between two groups.

Licence

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3 Questions

Q1.
What number would come next: 19, 18, 17 ___
15
Correct answer: 16
20
Q2.
What number would come first: ___ 12, 10, 8, 6, 4, 2
10
11
Correct answer: 14
Q3.
What is the missing number? 20, 18, ___, 14, 12, 10
Correct answer: 16
17
19

4 Questions

Q1.
Use counting objects to find half 18:
10
8
Correct answer: 9
Q2.
Use counting objects to find half 12:
10
2
Correct answer: 6
Q3.
Use counting objects to find double 9:
Correct answer: 18
19
20
Q4.
Use counting objects to find double 6:
Correct answer: 12
16
3