**Number:**MA.6.NSO.2

**Title:**Add, subtract, multiply and divide positive rational numbers.

**Type:**Standard

**Subject:**Mathematics (B.E.S.T.)

**Grade:**6

**Strand:**Number Sense and Operations

## Related Benchmarks

## Related Access Points

## Access Points

## Related Resources

## Educational Game

## Formative Assessments

## Lesson Plans

## Perspectives Video: Teaching Idea

## Professional Development

## Teaching Ideas

## Tutorials

## Video/Audio/Animation

## Student Resources

## Educational Game

Test your fraction skills by answering questions on this site. This quiz asks you to simplify fractions, convert fractions to decimals and percentages, and answer algebra questions involving fractions. You can even choose difficulty level, question types, and time limit.

Type: Educational Game

## Tutorials

This Khan Academy tutorial video explains patterns in the placement of the decimal point, when a decimal is multiplied by a power of 10. Exponents are NOT discussed.

Type: Tutorial

This Khan Academy tutorial video presents the methodology of understanding and using patterns in the number of zeros of products that have a factor that is a power of 10. While the standard does not mention exponents, the place value understanding of multiplying or dividing by powers of ten will help students understand multiplying and dividing by decimals.

Type: Tutorial

In this tutorial, you will see how mixed numbers can be divided.

Type: Tutorial

This video demonstrates dividing two numbers that are decimals.

Type: Tutorial

Let's show subtracting with digits up to the thousandths place in this tutorial.

Type: Tutorial

Watch as we align decimals before subtracting in this tutorial.

Type: Tutorial

Learn how to add decimals and use place value in this tutorial.

Type: Tutorial

This tutorial explores the addition and subtraction of fractions with unlike denominators. Using the number line, this mathematical process can be easily visualized and connected to the final strategy of multiplying the denominators (a/b + c/d = ad +bc/bd). The video number line does show negative numbers which goes beyond elementary standards so an elementary teacher would need to reflect on whether this video will enrich student knowledge or cause confusion.

Type: Tutorial

The video describes how to multiply fractions and state the answer in lowest terms.

Type: Tutorial

## Video/Audio/Animation

When working with fractions, divisions can be converted to multiplication by the divisor's reciprocal. This chapter explains why.

Type: Video/Audio/Animation

## Parent Resources

## Perspectives Video: Teaching Idea

Why did the math teacher KROS the ocean? Because it made for a wonderful way to engage students and do something unique.

Related Resources:

KROS Pacific Ocean Kayak Journey: GPS Data Set [.XLSX]

KROS Pacific Ocean Kayak Journey: Path Visualization for Google Earth [.KML]

Type: Perspectives Video: Teaching Idea

## Tutorials

This five-minute video answers the question "Must one always invert and multiply?" when dividing fractions. An alternative algorithm is presented which works well in certain cases. The video focuses on sense-making in using either method, and on judging the reasonableness of answers.

Type: Tutorial

The video describes how to multiply fractions and state the answer in lowest terms.

Type: Tutorial