Page 13 - Math Course 1 (Book 2)

Properties of Identity and Equality

Skill Practice!

Name the property used in each equation. Then f nd the value of n.

1. n + 0 = 19 2. 1 • n = 8

3. 28 • n = 0 4. 0 + n = 22

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5. • n = 1 6. n • 9 = 9
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7. 5 + n = 5 8. 2 • n = 2 • 3

9. 2(9 – 3) = 2(n) 10. (7 • 3) + 4 = n + 4

Evaluate each expression. Name the property used in each step.

15. 7(16 ÷ 4 ) 16. 2[5 – (15 ÷ 3)]
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17. 4 – 3[7 – (2 • 3)] 18. 4[8 – (4 • 2)] + 1

19. 6 + 9[10 – 2(2 + 3)]

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