# 5.3.3 Working with Negative Numbers by Hand

## Activity: Multiplying and Dividing Negative Numbers

Work out the following calculations by hand in your math notebook.

After doing the work by hand, check your results on the calculator.

The calculator can be accessed on the left-hand side bar under Toolkit.

(a)

### Discussion

Use the four rules for multiplying and dividing (Section 5.3.2) to determine the sign on your answer first, then carry out the operation without worrying about the signs.

(a) , since a negative number multiplied by a positive number gives a negative result.

(b)

(b) , since a negative number multiplied by a negative number gives a positive result.

(c)

(c) since a negative number divided by a positive number gives a negative result.

(d)

(d) , since a negative number divided by a negative number gives a positive result.

If you’d like to see these problems explained, click on “View document” and let’s see how these work!

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[ If you’d like some more explanation and extra practice with multiplication and negative numbers, visit this page. You can also create your own examples and check with the calculator. ]

You can also try using your multiplication skills with negative numbers in Grade or No Grade? to win the A+ from the “banker”.

5.3.2 Rules for Multiplication and Division of Signed Numbers

5.3.4 Negative Numbers Used in Golf