To find double and half within 20
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Lesson details
Key learning points
- In this lesson, we will double numbers by adding the same number to itself and halve even numbers by sharing equally between two groups.
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3 Questions
Q1.
What number would come next: 19, 18, 17 ___
15
20
Q2.
What number would come first: ___ 12, 10, 8, 6, 4, 2
10
11
Q3.
What is the missing number? 20, 18, ___, 14, 12, 10
17
19
4 Questions
Q1.
Use counting objects to find half 18:
10
8
Q2.
Use counting objects to find half 12:
10
2
Q3.
Use counting objects to find double 9:
19
20
Q4.
Use counting objects to find double 6:
16
3