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Home > CC3 > Chapter 2 > Lesson 2.1.3 > Problem 2-32


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

If you are having difficulty, try making the subtraction problems into addition problems.

Compute without a calculator


    If you drew the tiles, would you have any zero pairs?


    Change the subtraction into addition and then try solving using the same method used in part (a).

  1. When dividing or multiplying with negatives, you can do the division ignoring the signs and then account for negatives afterward.

    When dividing or multiplying with negative numbers, if there are an even number of negatives then the answer is positive; if there are an odd number of negatives then the answer is also negative.


    Try ignoring the negative signs to start and multiply as normal. At the end, account for any negative signs in the answer.


    Find a common denominator for the fractions in order to subtract.


    Remember that since you are dividing a positive number by a negative number, your answer will be negative.