Adding, Subtracting, Multiplying and Dividing Integers

Re-write the equation below to show what it would look like after applying the rule for subtracting integers (Same, Change, Change):

-10 - 5

(a)  

Answer the following:

12 + (-3) =

What is the rule when adding integers? For example: 13 + (-1) =

What sign would your answer have if you multiply a negative by a negative? For example: -9(-9) =

What would your answer by when you multiply two numbers with different signs? For example: -5(8) =

True or False: The answer to the equation -10(-5) is positive.

Solve: -5 + (-10) =

Solve: -12/6 =

Which operations do the following rules work for:
Signs of two numbers are different, answer is negative
Signs of two numbers are the same, answer is positive

The temperature was -5 degrees Fahrenheit in the morning, but by lunch time the temperature had increased 15 degrees. Which of the equations below would you use to find the temperature at lunch time?