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? asked in Science & MathematicsMathematics · 8 months ago

Can someone explain this math question to me?

Use properties of real numbers to rewrite the expression.

2/5 * (-7) * 5/2

I saw this in math yesterday, I didn't understand it so I just guessed. Thank you!

2 Answers

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  • Krishnamurthy
    Lv 7
    7 months ago

    2/5 * (-7) * 5/2

    = (2 * (-7) * 5) / 10

    = -7

  • ?
    Lv 7
    8 months ago

    Since it's all multiplication, we can rearrange

    (2/5)(5/2 * (-7)

    2/2 * 5/5 * -7

    = -7

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