Adding and Subtracting Integers Rules

What are the rules for subtracting integers?

• Change to multiplication and use the opposite of the second number.

• Change subtraction sign to addition and use the opposite of the second number.

• Find the opposite of both numbers and then add. 

• Subtract like normal and keep the larger sign. 

Rules for Adding Integers

• Keep Sign of Both Numbers

• Different Signs

  (Final Result)

• Keep Sign of "Larger"

• Different Signs

  (What to do...)

• Subtract the Numbers

• Same Signs

  (What to do...)

• Add the Numbers

• Same Signs

  (Final Result)

-22 + (-24)

• Signs are the Same

• Add the Numbers

• Negative

• -46

• 46

• -22

• 22

• Signs are Different

• Subtract the Numbers

• Positive

-9 + (-5)

• -14

• 14

• -4

-22 + (-24) 

• 46

• -22

• 22

• -46

-436 + 548

Saquan Barkley gained 9 yards on one play and then lost 22 yards on the next. Write a sum of integers to find the overall change in field position.

• -9 + (-22) = -13

• 9 + (-22) = 13

• 9 + (-22) = -13

Bob lost 5 points on page one of his math test and he lost 9 points on page two of his math test.  Which equation best describes Bob progress on his math test?

• 5 + 9 = 14

• -5 + (-9) = -4

• -5 + (-9) = -14

• 5 + (-9) = -4

A submarine at -32 feet dives down 18 feet. After the dive, what will be the submarines elevation?

• 14

• -14

• -50

• 50

-5 - (-17) ... Which addition sentence represents the same problem?

• -5 + 17

• -5 + (-17)

• 5 + (-17)

• 5 + 17