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Home > CCA > Chapter A > Lesson A.1.3 > Problem A-33

A-33.

Without a calculator, compute the value of each expression below.

Compute without a calculator

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    Use the Commutative Property of Addition and your understanding of minus signs to make this a subtraction problem.

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    When you multiply two numbers with the same sign, you will always get a positive result.

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    Change the subtraction into an addition

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    Simplify before multiplying

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    Multiply from left to right, finding the correct sign for each step before moving on.

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    Division uses the same rules
    for signs as multiplication.