Add within 1000

Practice adding threedigit numbers. All sums are 1000 or less.

Creating largest or smallest number

Sal arranges digits to make the largest or smallest possible number.

Add fractions with common denominators

Add two fractions with the like denominators.

Compare numbers: place value challenge

Compare multidigit numbers that challenge your place value understanding

Estimating with dividing decimals

For example, estimate 5609 ÷ 7 to be 800.

Unknown angle problems (with algebra)

Practice setting up algebraic equations to solve unknown angle problems.

Multiply monomials by polynomials: area model

Use area to understand how to multiply monomials by polynomials.

Find inverse functions

Practice finding the formula of the inverse function of a given polynomial, radical, or rational function.

Approximating square roots

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Arc length challenge

Solve some challenging problems about the arc length of onevariable curves.

Math patterns 1

Identify arithmetic patterns (including ones in the addition or multiplication tables), and explain them using properties of operations.

Subtract 2digit numbers (no regrouping)

Practice solving problems like 45  24.

Comparing numbers to 10

Practice saying if one number is less than or greater than another number. Numbers are between 0 and 10.

Apostrophes and plurals

Apostrophes are generally not used to form English plurals, but there are a few exceptions.

Auxiliary (helping) verbs

Is the underlined verb the main verb in the sentence, or is it helping the main verb?

Common and proper nouns

Learn to distinguish common and proper nouns from one another!

Quiz: Variables


Expected value with empirical probabilities

Find expected value based on empirical probabilities.

Dashes and hyphens

Learn the uses of—and differences between—dashes and hyphens.

Skill check: Computing derivatives, part 1

See how well you can compute a derivative.
