Pre Algebra Calculator

A free pre-algebra calculator solves basic math topics like fractions, decimals, percents, ratios, exponents, and basic equations, and it shows the steps so you can learn the method—not just the answer.

• 1. Whole Numbers (add, subtract, multiply, divide)
• 2. Fractions & Mixed Numbers (simplify, add/subtract, multiply/divide)
• 3. Decimals (operations, rounding, comparisons)
• 4. Ratios & Proportions (unit rate, missing value, scale)
• 5. Percents (percent of, increase/decrease, discounts)
• 6. Exponents & Radicals (powers, square roots, rules)
• 7. Modulo (remainder problems)
• 8. Scientific Notation (multiply/divide, convert forms)

Type your problem (or use parentheses to control the order), click "Solve", and learn how to get the answer.

• 1. Enter a question ((e.g., 3/4 + 1/8, 5% of 240, (2+3)^2, 3x − 7 = 14))
• 2. Click "Solve"
• 3. Review the step-by-step explanation

9-3÷1/3+1

5/8 + 7/8

22−7

(3⋅10^(5))(2⋅10^(4))

(-48)/(-8)

4-(-2)

-7b-12=-61

Algebra Calculator