Adding and Subtracting Rational Numbers

This lesson teaches how to convert subtraction into addition in expressions with rational numbers. It explains the concept of 'same change, opposite' to transform subtraction into addition. The lesson also covers evaluating expressions using the commutative property and provides a step-by-step guide to solving an example expression. By the end, students will understand how to apply these properties to simplify and solve rational number expressions.

What is the method used to change a subtraction expression into an addition expression?

• Associative property

• Commutative property

• Same change, opposite

• Inverse operation

Which property allows you to change the order of addends without changing the sum?

• Commutative property

• Associative property

• Distributive property

• Identity property

When adding rational numbers with different signs, what should you do?

• Add their absolute values

• Divide their absolute values

• Multiply their absolute values

• Subtract their absolute values

What is the result of adding -3 and -5?

• 8

• 2

• -8

• -2

What is the final value of the expression after evaluating -8 and 2?

• -6

• -10

• 6

• 10