1.5 Quiz Review Add/Subtract Rational Numbers

9.01 - (- 4.09)

• 13.10
• 4.82
• -13.00
• 5.02

When adding rational numbers with the same sign, you must:

• Subtract and keep the sign of the biggest number

• Add together and keep the sign

• Keep, change, switch

• Add the opposite

To add two fractions, I need a...

• common denominator

• multiply by the reciprocal

• keep, change, flip

• extra help

When adding decimals with the same sign you.....

• subtract and take the sign of the larger number
• add the opposite
• add and keep the sign
• subtract and keep the sign

When adding decimals with different signs you....

• subtract and take the sign of the larger number
• add the opposite
• add and keep the sign
• subtract and keep the sign

Rewrite the problem as addition.

-5.66 - (-4.1)

• 5.66 + (-4.1)

• -5.66 + 4.1

• -5.66 + (-4.1)

• -5.66 - 4.1

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.