Applying adding and subtracting integers

What is the rule when subtracting integers?

For example: 13 - (-12) =

• Keep the signs and add

• Same, Change, Change

• A positive times a negative is a negative

• Same, Same, Change

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

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.

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

For example: -9(-9) =

• Positive

• Negative

Solve: 10 - (-18) =

• 8

• 28

• -8

• -28

A football team gained 6 yards on a first down, lost 15 yards on the second down, and gained 12 yards on the third down. How many yards did the team gain or lose?

• 3 yards
• 33 yards
• 21 yards
• 9 yards

A research team aboard an underwater research vessel descends 1,500 feet beneath the surface of the water. They then rise 525 feet and descend again 350 feet. How far below the surface is the research team?

• 2375 feet
• 625 feet
• -1325 feet
• 1250 feet

The highest recorded temperature on Earth was recorded in Africa at 136°F, while the lowest was -129°F in Antarctica. What was the difference in the temperatures?

• 268^oF

• 7^oF

• -268^oF

• -7^oF

A scuba diver is at a depth of 82 feet. He descends another 19 feet. Write his new depth as an integer.

• -101 feet
• -82 feet
• 101 feet
• 19 feet