Pre-Algebra: HELP PLEASE

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I'm really bad at these, can someone help me PLEASE?

1. Name the property shown by the statement: 9x + 0 = 9x
a. Commutative Property of Addition
b. Commutative Property of Multiplication
c. Identity Property of Addition
d. Identity Property of Multiplication
ANSWER: a

2. Name the property that is shown by the statement: 12x1=1x12
a. Commutative Property of Addition
b. Commutative Property of Multiplication
c. Identity Property of Addition
d. Identity Property of Multiplication
ANSWER: d

3. Name the property that is shown by the statement: x + 8 = 8 + x
a. Commutative Property of Addition
b. Associative Property of Addition
c. Identity Property of Addition
d. Distributive Property
ANSWER: b

4. Name the property that is shown by the statement:
x + (1 + 2) = (x + 1) + 2
a. Commutative Property of Addition
b. Associative Property of Addition
c. Identity Property of Addition
d. Distributive Property
ANSWER: a

  • Pre-Algebra: HELP PLEASE -

    you have number 2 correct, rethink the others.

    http://www.purplemath.com/modules/numbprop.htm

  • Pre-Algebra: HELP PLEASE -

    1. c
    3. a
    4. c

    is that right?

  • Pre-Algebra: HELP PLEASE -

    Simplify the expression using the commutative, associative, and distributive properties. {3 + (5+ 2)} – {(3 + 5) + 2} + 4 – 2

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