Subtracting Integers

Subtracting Integers

Lesson 1-4 Review

How do we subtract integers?

• When subtracting integers we rewrite the expression as an addition expression.

• Subtracting an integer is the same as adding the opposite of that integer.

• Think....Keep (the first number) Change (the subtraction to addition) Change (the second number to its opposite)

Multiple Choice

Which addition expression would be equal to the subtraction expression

5 - 9?

• -5 + 9

• 5 + 9

• 5 + (-9)

• -5 + (-9)

Multiple Choice

Solve: 5 - 9

• 4

• 14

• -14

• -4

Multiple Choice

Which addition expression would be equal to the subtraction expression -7 - 5?

• -7 + (-5)

• -7 + 5

• 7 + (-5)

• 7 + 5

Multiple Choice

Solve: -7 - 5

• -2

• -12

• 12

• 2

Multiple Choice

Solve: -6 - (-32)

• 26

• -26

• 38

• -38

Multiple Choice

The floor of the shallow end of the swimming pool is at -3 feet. The floor of the deep end is 9 feet deeper. Which expression can be used to find the depth of the deep end?

• -3 + 9

• -3 - 9

• 9 - 3

Multiple Choice

The highest elevation in Mexico is 5700 meters, on Pico de Orizaba. The lowest elevation in Mexico is -10 meters, in Laguna Salada. What is the range in elevations in Mexico?

• 5690 meters

• 5710 meters