Background Tutorials

• Use decimal notation for fractions with denominators 10 or 100.

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    What are Decimals?

    Have you ever looked at the price of something? It's usually given as a decimal! Decimals are a very helpful part of math and can be found in may places in the real world. Watch this tutorial to learn all about decimals!

• Use place value understanding to round decimals to any place.

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    How Do You Round a Decimal to a Given Place Value?

    Sometimes, decimals are so long that you need a way to estimate the value of the decimal. Other times, you may only need a certain amount of exactness to get your answer. This is where rounding decimals to a chosen place can be very helpful! Watch this tutorial to learn how to round a decimal to a chosen place.

• Find and position integers and other rational numbers on a horizontal or vertical number line diagram; find and position pairs of integers and other rational numbers on a coordinate plane.

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    How Do You Graph a Set on a Number Line?

    Number lines are great ways to represent a group of numbers, and in this tutorial you'll see how to graph a group of numbers on a number line

• Know that numbers that are not rational are called irrational. Understand informally that every number has a decimal expansion; for rational numbers show that the decimal expansion repeats eventually, and convert a decimal expansion which repeats eventually into a rational number.

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    What's a Real Number?

    Real numbers are numbers that can be found on the number line. This includes both the rational and irrational numbers. This tutorial explains real numbers and gives some great examples. Take a look!