Grade 1

Share the Headline Story with the class. If children need help getting started, ask, “What numbers could the shapes stand for?” You might make a table to show all the possible combinations.

Alana used shapes to write this number sentence.

- The triangle stands for one number and the square stands for another number.
- If the triangle stands for 10, the square stands for 6 because 10 + 6 = 16.
- If the triangle stands for 9, then the square stands for 7 because 9 + 7 = 16.
- If the triangle stands for 9, then the square stands for 7 because 9 + 7 = 16.
- If the triangle and the square both stand for the same number, the number must be 8 because 8 + 8 = 16.

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