Adding and Subtracting and Multiplying and Dividing Integers

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

• If the signs are the same, add and keep the sign. If the signs are different, subtract and keep the sign of the larger whole number.

• A negative times a negative equals a positive.

• Same, Change, Change

• A negative divided by a positive equals a negative.

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

-10 - 5

Answer the following:

12 + (-3) =

• 15

• -15

• 9

• -9

When a submarine starts at sea level, goes down 250 feet, rises 80 feet, and descends another 18 feet, how would this be shown mathematically?

• 250 + 80 + (-18)

• -250 + 80 - (- 18)

• 250 + -( 80) + (- 18)

• -250 + 80 + (-18)

Match

• -216

• -3 + 14

• 29

• 72(-3)

• 12

• 24 - (-5)

• 3

• -7 - (-10)

• 11

• 18 + (-6)

Coach Bob’s football team lost 8 yards, gained 5 yards, and lost 2 yards on their first 3 plays from the line of scrimmage.
The team’s current position is ​​ (a)   yards relative to the original line of scrimmage.
The additive inverse,​ (b)   represents the number of yards the team needs to gain in order to return to the original line of scrimmage.

• -5

• 5

• 15

• -15

What sign would your answer have if you multiply a negative by a negative?

For example: -9(-9) =

• Positive

• Negative

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

• True

• False

Solve: -5 + (-10) =

• 5

• -15

• -5

• 15

Solve: -12/6 =

• -6

• -2

• 18

• 2