Comparisons
Recall addition and subtraction facts to 20.
Number Framework Stage 5
Using Materials
Problem: Martin has $7 and David has $3 more than Martin. How much money does David have?
In pairs the students build a line of 7 counters for Martin and experiment with building David’s line along side Martin’s. Discuss why the answer is found by 7 + 3.Write 7 + 3 = 10 on the board.
Problem: Tusi has $11 and Mere has $8 less than Tusi. How much money does Mere have?
In groups the students build 11 for Tusi and experiment with building Mere’s line. Discuss why the answer is found by 11 - 8. Write 11 - 8 = 3 on the board.
Examples. Comparison word stories and recording for: 8 + 3, 11 – 2, 7 – 3, 11 – 5, 7 + 3, 4 + 5, 10 - 8….
Using Imaging
Shielding and Imaging Only:
Examples. Comparison word stories and recording for: 2 + 6, 12 – 4, 7 – 6, 11 – 2, 4 + 5, 2 + 11, 10 - 4….
Using Number Properties
Examples: Comparison word stories and recording for: 28 + 6, 12 – 4, 7 – 6, 11 – 2, 4 + 5, 2 + 11, 10 - 4….
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