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Explore adding a positive number and a negative number: (7) + (-2)
- Bring out 9 positive tiles.
- Bring out 2 negative tiles
- Make zero pairs and elimate them.
(7) + (-2) = _

Use absolute value:
|7| = 7 - 7
|-2| = _ - -2/5

7 has the greater absolute value, and 7 is positive in (7) + (-2), so the sum is positive.
When you add a positive number and a negative number, the sign of the sum is the sign of the number with the greater absolute value.

1 answer

Let's fill in the blanks based on your instructions:

Explore adding a positive number and a negative number: (7) + (-2)

  • Bring out 9 positive tiles.
  • Bring out 2 negative tiles.
  • Make zero pairs and eliminate them.

(7) + (-2) = 5

Use absolute value: |7| = 7 - 7 |-2| = 2 - -2/5

7 has the greater absolute value, and 7 is positive in (7) + (-2), so the sum is positive. When you add a positive number and a negative number, the sign of the sum is the sign of the number with the greater absolute value.