Page 74 - TB_6B

Objective: Learn how to multiply and divide rational numbers

What was the temperature three minutes ago?

If the current temperature is represented by 0, the past temperature can be
represented by a negative sign , and the future temperature can be
represented by a positive sign . The temperature three minutes ago can
be found using the equation below.

1 3=
2

The temperature was 3 minutes ago.

The current temperature is 0 .

How many minutes would it take to reach 5 ?
2

The temperature drops 1 per minute. The minutes taken to reach the
2

temperature of 5 can be found by using the equation below.
2

5 1 =
2 2

It takesminutes to reach 5.
2

23. The Changes in Temperature 63