Practice Evaluation in Math

Use these practice problems to test your method after reviewing the concept explanation and worked examples.

Quick Recap

The process of calculating the numerical value of a mathematical expression by substituting specific numbers for each variable and then performing the indicated operations following the order of operations (PEMDAS/BODMAS).

Plug in the number and compute: if x = 3, then 2x + 1 = 2(3) + 1 = 7.

Example 1

easy
Evaluate 5x - 3 when x = 4.

Example 2

medium
Evaluate \frac{a^2 - b^2}{a + b} when a = 5 and b = 3.

Example 3

easy
Evaluate -2x + 10 when x = -3.

Example 4

hard
If f(x) = x^3 - 2x, find f(-2).
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