Khan Academy: Arithmetic and Pre Algebra: Decimals on a Number Line

Make your own number line ... using a compass. The first installment of a 21-part series has scholars investigate positive and negative integers on a number line by using a compass to construct points that are the same distance from zero...

Fractions are a common fear in school, but visualizing them on a number line can help your learners understand their relationship to one another. The activity provides two solutions; use either a number line or a common denominator....

Using a number line can provide students with a concrete representation of the value various numbers hold. Sal plots 6 different numbers on a number line. He includes whole, decimal, and negative numbers.

A video covering a review of subtraction using a number line, followed by subtraction of numbers up to three-digits by using borrowing and regrouping. Practice problems available. [18:26]

This video shows how to round a five-digit number to the nearest hundred using a number line. Practice problems are available. [4:23]

Sal Khan compares decimals on a number line.

In this exercise, students practice comparing positive and negative numbers on the number line. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.

This video shows how to round a 4-digit number to the nearest ten. Practice problems are available. [1:04]

This video explains how to find the reciprocal of a mixed number. [1:41]

Through four steps, three different time values for a 100-meter run are arranged on a number line in order to practice ordering decimal numbers. The price of two sports drinks are also compared. All of this comes in narrated and animated...