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16 June, 01:17

Write an expression that is equivalent to - 30 + (-40) + (-70) using the commutative property of addition.

HINT: Your answer should be in this form: X + Y + Z NOT just one number

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  1. 16 June, 01:22
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    The desired expression is - 30 + (-70) + (-40) or - 70 + (-40) + (-30)

    Step-by-step explanation:

    Here, the given expression is - 30 + (-40) + (-70)

    Let us assume here, X = (-30)

    Y = (-40) and Z = (-70)

    So, the given expressions is of the form X + Y + Z

    Commutative Property states that for any number A, B and C:

    A + (B+C) = (A+B) + C

    So, here (X+Y) + Z = X + (Y + Z)

    ⇒The given expression can also be written as

    -30 + (-70) + (-40), or, - 70 + (-40) + (-30)

    Hence, the desired expression is - 30 + (-70) + (-40), or, - 70 + (-40) + (-30)
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