Testing if Expressions Are Equivalent
I can check whether two expressions are equivalent by trying the same value in both.
📘 Word Bank + Sentence Frames
equivalentsubstituteevaluatesame value
- Two expressions are equivalent if they give the same value for every number.
- Test by substituting a number into both.
👀 See It
Is x + x equivalent to 2x? Try x = 3: 3 + 3 = 6 and 2 × 3 = 6. Same → equivalent.
✏️ Your Turn
0 of 3 checks complete
1. Which is equivalent to x + x?
2. Is 3x equivalent to x + x + x?
3. Test x = 2: which equals 2(x + 1)?
💬 Explain Your Thinking
Explain how you test for equivalence:
"I put blank into both expressions. They gave blank and blank, so they are blank equivalent."