### Course Content

- Do your assignments.
- Review the above video and then complete the following exercise .
- Or for the FREE subscription complete the following worksheets .

## Objective:

The purpose of this exercise is to create a formula to solve a problem and then apply it to integers. Also that when subtracting a negative value the result is the same as adding.## Help on this Topic:

In this question we create a formula as before, and think of people getting off a bus for negative values, or getting on the bus for positive values.

The only difference is that if we subtract a negative number, we replace that with adding a postivie number.

Example question

If Moscow is 11 degrees, and Leningrad is 4 degrees, how much hotter is it in Moscow

(#Temp in Moscow) - (#Temp in Leningrad)

-> This part at the bottom of the question is the formula, it means

(The temperature in Moscow) subtract (the temperature in Leningrad)

So our answer is

(11) - (4)

=7

Example question 2

If Moscow is -6 degrees, and Leningrad is -11 degrees, how much hotter is it in Moscow

(#Temp in Moscow) - (#Temp in Leningrad)

-> This part at the bottom of the question is the formula, it means

(The temperature in Moscow) subtract (the temperature in Leningrad)

So our answer is

(-6) - (-11)

Whenever we try to subtract a negative number it is the same as adding a positive number so our formula is now

(-6) + (11)

=5