# 5.6.3 Self-Check on Multiplication and Division of Negative Numbers

## Exercise 7: Negative Numbers

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

Work out the following calculations by hand, then check your answers by working out the calculation on your calculator.

(a)

(a) .

(b)

(b) .

(c)

(c) .

(d)

(d) .

(e)

(e) .

(f)

(f) .

(g)

(g) .

(h)

(h) .

(i)

(i) .

(j)

(j) .

(k)

(k) .

## Exercise 8: Repeated Withdrawals

At the end of the month, your account balance was $124. Over the course of the following month, you withdrew$72 three times. What was your new balance?

Your new balance = , or your account is overdrawn by $92. ## Exercise 9: Sharing Debt In 2009 the U.S. National Debt was approximately$11 trillion and the U.S. population was roughly 300 million. How can the debt be represented per person?
If the debt were split up among the citizens, it would be represented as (-$11 000 000 000 000) ÷ 300 000 000 people = (-$36,667) per person