US customary conversion word problems

Practice US customary length, volume, and mass problems that require expressing measurements given in a larger unit in terms of a smaller unit.

Multiplication and division word problems

Practice solving multiplication and division word problems. Some problems have remainders.

Systems of linear equations word problems: Level 2


Volume of cones

Practice applying the volume formulas for cones.

Volume of spheres

Practice applying the volume formulas for spheres.

Weighted average intuition

First let's make sure you are comfortable with this construction.

Weighted averages

Calculate what weighting used in a weighted average of two points.

Weighted subdivision

Understanding what happens in subdivision with different weights

Weighted average of three points

Now it's your turn to prove you can calculate the weighted average. Later on we can let the computer do these calculations for us (phew!)

Write differential equations

Write differential equations based on the description of a relationship between two quantities.

Write fractions as whole numbers

Represent fractions as whole numbers and whole numbers as fractions.

Zeros of polynomials challenge problems

Solve some more challenging problems that involve reasoning about the zeros of polynomials.

Equivalent fraction models

Identify and create equivalent fractions using visual models.

Create rectangles with a given area

Practice finding the area of rectangles by counting unit square. Create rectangles with a given area by covering unit squares.

Measure to find area

Practice measuring the sidelengths of a rectangle to find its area.

Multiply by tens word problems

Solve word problems with multiples of ten. Decompose multiples of ten to multiply.

Multiplying 10s

Practice multiplying 2digit multiples of 10, such as 50x70=3500.

Multiply with arrays

Practice multiplying 1digit numbers using arrays.

Compare fractions of different wholes

Compare two fractions based on the whole that each one refers to.

Patterns in multiplication tables

Practice discovering and explaining patterns in multiplication tables.
