Unit 5 Lesson 20 and 21 Vocabulary Flashcards

1

What is a letter that represents an unknown number?

2

What are operations that undo each other?

3

What are two or more expressions in different forms that always name the same value?

4

What is a mathematical statement that uses an equal sign to show that two expressions have the same value?

5

What is to flip?

6

What is to prove, show, find out or state that some is true or correct?

7

What is to replace on thing with another

8

What is a value that can be substituted for a variable to make an equation true?

Unit 5 Lesson 20 and 21 Vocabulary