Subtracting Rational Numbers

-2.74 - (-10)

Explain the rule for subtracting integers.

Rate your understanding.

Do you feel comfortable and secure with subtracting integers?

• Completely secure

• Somewhat secure

• A little secure

• Not secure at all

9-(-2)

• 7
• -7
• 11
• -11

What is the rules for subtracting integers?

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

-7 - (-12) =

• -19

• 5

• -5

• 19

128.008 - 110.995 =

• 17.013

• 17.913

• 18.013

• 18.003

What is the value of –12.45 − (–206.3)?

• -218.75

• -193.85

• 193.85

• 218.75