Title Description
Add within 1000 Practice adding three-digit 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 multi-digit 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 .
Arc length challenge Solve some challenging problems about the arc length of one-variable curves.
Math patterns 1 Identify arithmetic patterns (including ones in the addition or multiplication tables), and explain them using properties of operations.
Subtract 2-digit 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.