Match the number sentence with the correct property. (7.NS.2a) 4 pts (4 points) Associative Property Commutative Property Identity Property of Multiplication Zero Property of Multiplication zz(- 1)(3) = (3)(- 1); 5^ * (-2 2 5 ^ * 1 2 )=(5^ * - 2 2/5 )^ * 1 2; :: - 4 + (- 5) = - 5 + (- 4); :: - 1.58 deg * 1 = - 1.58; =0^ * 6 9/11 = 0; :: 0 + 12.9 = 12.9; :-2 5 6 ^ * (- 1) = 2 5/6

1 answer

Let's match each number sentence with the correct property:

  1. Commutative Property: \( (-1)(3) = (3)(-1) \)

    • This property states that the order of multiplication does not change the product.
  2. Associative Property: \( (5^ * (-2) 2 5^ * 1 2) = (5^ * -2 2/5)^ * 1 2 \)

    • This property refers to the changing of grouping in multiplication without changing the product.
  3. Commutative Property: \( -4 + (-5) = -5 + (-4) \)

    • This property shows that the order of addition does not change the sum.
  4. Identity Property of Multiplication: \( -1.58 \cdot 1 = -1.58 \)

    • This property states that any number multiplied by 1 will remain unchanged.
  5. Zero Property of Multiplication: \( 0 \cdot 6 = 0 \)

    • This property states that any number multiplied by 0 is 0.
  6. Identity Property of Addition: \( 0 + 12.9 = 12.9 \)

    • This property states that any number plus 0 will remain unchanged.
  7. Commutative Property: \( \frac{5}{6} \cdot (-1) = -\frac{5}{6} \)

    • This property does not have a defined label in the options given, thus it's solely an example of multiplication with a negative number.

So the correct matches are:

  • \( (-1)(3) = (3)(-1) \) → Commutative Property
  • \( (5^ * (-2) 2 5^ * 1 2) = (5^ * -2 2/5)^ * 1 2 \) → Associative Property
  • \( -4 + (-5) = -5 + (-4) \) → Commutative Property
  • \( -1.58 \cdot 1 = -1.58 \) → Identity Property of Multiplication
  • \( 0 \cdot 6 = 0 \) → Zero Property of Multiplication
  • \( 0 + 12.9 = 12.9 \) → Identity Property of Addition
  • \( \frac{5}{6} \cdot (-1) = -\frac{5}{6} \) → Not defined in options but shows multiplication by a negative number.

If you intended to only use each property once, stick to the first sets of matches.