Integers, decimals, and square roots

Adding and Subtracting Integers
Add and subtract integers on a number line using dynamic arrows.
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Adding and Subtracting Integers with Chips
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.

Adding on the Number Line
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.

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

Multiplying with Decimals
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.

Solving Equations on the Number Line
Solve an equation involving decimals using dynamic arrows on a number line.
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Square Roots
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.

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