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

Having a good number sense is key to understanding place value. This video clearly explains the place values that comprise a decimal number. It is a very straightforward presentation and would be appropriate for grades three, four, or...

A real number is any number that you can find on a number line. This includes rational and irrational numbers, which means positive numbers, negative numbers, decimal numbers, square root numbers and even pi.

Two fractions with unlike denominators. Compare and figure out which one is greater. There are a couple of ways to do this. This time change the fractions to decimals to compare. Once the values are found, they can also be plotted on a...

Use the addition property of inequality to solve this problem. Since this is a subtraction problem, the opposite is used to isolate the variable. It's just a one-step solution. But don't forget this is a decimal problem so line up the...

In order to solve this inequality use the addition property of inequality to isolate the variable. Don't forget that these are decimal numbers. So be sure to line up the decimals according to the rules of adding decimals.

How do fractions and decimals relate? Scholars learn how to change base-10 fractions to decimals and vice-versa. The sixth resource in a 16-part series revisits decimal place value. The video walks through the steps to write decimal...

Solve this algebraic equation by isolating the variable. In this one-step problem that is done by using the subtraction property of equality. There are decimal numbers in this equation so be sure to line up the numbers according to the...

A series of fractions, decimal numbers, and percentages that have to be put in some order. Many young mathematicians skip problems like this because they have to do some converting and if long division is involved many definitely skip...

Many young mathematicians skip problems like this because they just don't want to do the work to figure it out. A series of fractions and decimal numbers that they have to put in some order. So they have to do some converting and if long...

Isolate the variable to solve any equation. This equation happens to be an inequality but is solved no different than if it were just an equation. Use the subtraction property of inequality to solve this given problem. The numbers are...

Divide decimals to solve this inequality! Learners can watch the instructor in this thorough video as she works through an inequality that contains decimals. This resource is appropriate for teaching, reinforcing, or reviewing the concept.

Estimation is a good way to build and assess a student's number sense. Watch as Sal uses estimation to solve a problem where he must determine how much 'Janelle' ran during a 4-day period. He calculates the exact amount and compares the...

Use an understanding of equality to find solutions of quadratics graphically. A well-designed lesson illustrates the relationship between the right and left sides of an equation graphically. With one side quadratic and the other side...

Subtracting? Line up the decimals, line up the decimals, line up the decimals! Put in place-holder trailing zeros, when necessary. Now do your subtraction. When you have your answer, bring down the decimal, bring down the decimal, bring...

Don't go around and around, help your class determine amounts around and in a circle with a video that connects circumference to the perimeter or the distance around an object. The resource includes 14 questions dealing with circles and...

Subtracting decimals is the same as subtracting numbers without decimal points. But wait, there is one key thing every kid needs to remember, you have to line up the decimals. How? Duane shows us how he lines up his numbers based on...

Comparing decimals can be easy. Watch and learn how to line up four decimal numbers vertically and then starting from the left, compare each number in each place value to determine which is largest and which is smallest. This procedure...

This video shows how to locate and plot a decimal number on a number line. Practice problems are available. [1:39]

Sal identifies decimals through the thousandths on a number line.

The user is shown how one can divide a whole number by a decimal on a number line.