Rules, Rules, Rules
The first step to solving an addition problem.
Look at the signs.
-2 + -8
-10
7 - 19
-12
-30/(-10)
3
-3 x (-6)
18
When multiplying, if the signs are the same, your answer is _________.
Positive
|-5| + 12
17
-18 - 7
-25
-18/9
-2
-8 x 6
-48
When adding, if the signs are different, _________ and take _________________.
Subtract and take the larger number's sign.
-14 + 22
8
-16 - (-5)
-11
84/(-7)
-12
-12(5)
-60
For multiplication and division, if the signs are different, your answer is _________.
Negative.
10 + (-17)
-7
-11 - (-27)
16
Evaluate the expression when x=3 and y = -12
y/x
-4
-|-7| x (-10)
70
The first step to subtracting integers is:
Change the subtraction sign to an addition sign. Then, change the second number’s sign. (Think, “add the opposite”).
15 + (-11) + (-13)
-9
-6 - (13) - (-4)
-15
Evaluate the expression when x = 7, y = -4, and z = -5
(x-z) / y
-3
(-9 x (-6)) x (-2)
-108