Evaluate the Expression
Accuracy: 100%
Streak: 0
Evaluating Algebraic Expressions
Substitute numbers for variables and calculate the result.
Student Tips:
- Replace each letter with the given number
- If x = 3 and the expression is 2x + 5, substitute: 2(3) + 5
- Follow order of operations: 2(3) + 5 = 6 + 5 = 11
- Be careful with negative numbers: if x = -2, then x² = (-2)² = 4
- Write out each step clearly
Teaching Instruction: Start with simple expressions with one variable. Practice substitution separately from calculation. Use parentheses when substituting to avoid sign errors. Connect to real-world formulas (area, perimeter, distance).
