Browse by Grade & Topic: Integers, Decimals, and Square Roots

Add and subtract integers on a number line using dynamic arrows.

Add real numbers using dynamic arrows on a number line. Find the sum of the numbers at the end of the final arrow. Compare the numerical calculation.

Use chips to model addition and subtraction of positives and negatives. Explore the effect of zero pairs. See how to use zero pairs to help special cases of addition and subtraction.

Use grids to model decimal numbers and compare them graphically. Then compare the numbers on a number line.

Multiply two decimals using a dynamic area model. On a grid, shade the region with width equal to one of the decimals and height equal to the other decimal and find the area of the region.

Solve an equation involving decimals using dynamic arrows on a number line.

Explore the meaning of square roots using an area model. Use the side length of a square to find the square root of a decimal number or a whole number.

Find the sum or difference of two decimal numbers using area models. Find the decimals and their sum or difference on a number line.