Applied Mathematics: Arithmetic & Pre-Algebra

Khan Academy

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The first math topic. Start here if you want to learn the basics (or just want to make sure you know these topics). After this, you should be ready for algebra.

Addition and substraction

• Adding and subtracting positive and negative whole numbers. Starts with 1+1=2 and covers carrying, borrowing, and word problems.

Multiplication and division

• Multiplying and dividing positive and negative whole numbers, understanding place value, and rounding numbers.

Negative numbers and absolute values

• Understanding and using negative numbers.

Order of operations

• Defining the order in which operations are done in expressions.

Factors and multiples

• Understanding and finding factors and multiples. After these videos, you'll be ready for fractions.

Fractions

• Understanding fractions conceptually, using operations with fractions, and converting fractions.

Decimals

• Understanding decimals conceptually, using operations with decimals, rounding and estimating with decimals, and converting decimals.

Percents

• Understanding, solving, and converting percents.

Ratios and proportions (basic)

• Solving and writing ratios and proportions without algebra.

Exponents (basic)

• Understanding and solving exponents without algebra.