Plug In the Number
I can evaluate an expression by substituting a value for the variable.
📘 Word Bank + Sentence Frames
evaluatesubstitutevariableformula
- To evaluate, replace the variable with the number, then compute.
- Frame: "When ____ = ____, the expression equals ____."
👀 See It
Evaluate 3x when x = 4: 3 × 4 = 12
✏️ Your Turn
0 of 3 checks complete
1. Evaluate x + 5 when x = 2.
2. Evaluate 2n when n = 6.
3. Evaluate a − 3 when a = 10.
💬 Explain Your Thinking
Show how you evaluate an expression:
"When blank = blank, I replace the variable and get blank."