Headline Story
Probability and Data, #6
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Introduction
Draw the number sentence from the Headline Story on the board. Encourage children to create problems that can be solved using the subtraction sentence.
Headline Story
15 — Square = Triangle
Possible student responses
I had 15 minutes to get to school, but I used some of the time getting dressed.
Jen had 15 dollars, but she bought a book. How much did she have left?
Let’s make a table of some possible solutions.
| Square | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Triangle | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 |
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