KhanAcademyExercises

Practice solving problems that include four 2-digit numbers.

Practice identifying the value of US coins and dollars.

Write numbers in word and expanded form within 1000.

Practice measuring the efficiency of an algorithm (both by counting steps and tracking time), in this set of free practice questions designed for AP Computer Science Principles students.

Factor quadratics of the form ax²+bx+c.

Practice determining the composition of mixtures in this set of free questions designed for AP Chemistry students.

Check your understanding of atomic structure and electron configuration in this set of free practice questions designed for AP Chemistry students.

More challenging multiplying monomial problems like find the area or find missing values to make an equation true.

In this exercise, practice using data from a production possibilities curve to calculate opportunity costs.

Let's practice all the identities we've discussed so far.

Let's practice to find the total number of covalent bonds present by counting the number of bonds present between all the atoms in a compound.

Find expressions that represent areas between two polar curves.

Find the zeroes ("roots") of quadratic functions and the vertex of their parabolas. Functions are given in standard, vertex, and factored form.

Find expressions that represent areas bounded by polar curves.

Practice tangent lines of functions defined with polar coordinates.

8th grade reading comprehension practice on A Midsummer Night's Dream

Use transformations, triangle congruency criteria, and line and angle relationship to prove parallelogram properties.

9th grade reading comprehension practice using an informational text on the apocalypse in fiction and film

Practice solving word problems involving four 2-digit numbers.

Add and subtract lengths to solve word problems. All problems are in inches and feet.