# MathMammoth

## Percent Play

Learn all the basics of percent: what is percent, percentages into decimals, calculate percentages, discounts, sales tax, percent of change, and percent of comparison.

## Fractions - add and subtract Play

We start by converting mixed numbers to fractions and vice versa. Then, we add & subtract like fractions, and next add & subtract mixed numbers with like fractional parts. Then it is time to learn equivalent fractions in preparation to adding unlike fractions. Next, we add & subtract unlike fractions, and lastly we learn to compare fractions

## My favorites from 24K Gold Play

24K Gold songs that I like the best!

• ### Partial Products or Multiplying in Parts

• 323 views
• 4 months ago
• ### Scale / Balance Math Problems (Simple Equations)

• 601 views
• 5 months ago
• ### Partial Products Algorithm - The Easy Way to Multiply

• 379 views
• 5 months ago
• ### Math Mammoth information - various series

• 292 views
• 8 months ago
• ### Math Mammmoth - Ordering info

• 133 views
• 8 months ago
• ### Math Mammoth Green Series

• 277 views
• 9 months ago
• ### Math Mammoth Light Blue Series

• 4,351 views
• 9 months ago
• ### Math Mammoth Golden Series

• 593 views
• 9 months ago
• ### Math Mammoth Blue Series

• 932 views
• 9 months ago
• ### Scaling figures and the scale ratio

• 3,714 views
• 2 years ago
• ### Proportional relationships / Direct variation

• 9,466 views
• 2 years ago
• ### Unit Rates and More about Proportions

• 1,223 views
• 2 years ago

• ### Long Division: How to Teach it Step-by-Step

• 178,534 views
• 4 years ago
• ### Structured drill of the multiplication tables - much more effective!

• 125,539 views
• 2 years ago
• ### Video: How to use a protractor

• 119,618 views
• 4 years ago
• ### Subtracting integers video - three models to explain how subtraction of negative numbers works

• 113,596 views
• 4 years ago
• ### Zero Exponent Video: Teach it with a Pattern!

• 94,058 views
• 5 years ago
• ### Calculate percentages with mental math - video from Math Mammoth

• 89,031 views
• 4 years ago
• ### Strategies for Addition and Subtraction Facts - Video from Math Mammoth

• 88,764 views
• 4 years ago
• ### Teaching subtraction with regrouping

• 61,656 views
• 4 years ago
• ### Multiply & Divide Decimals by 10, 100, and 1000

• 52,964 views
• 4 years ago
• ### Equivalent fractions - split the pieces!

• 37,147 views
• 2 years ago
• ### Dividing decimals - why do we move the decimal point?

• 35,471 views
• 4 years ago
• ### Teaching multiplication algorithm - video

• 34,120 views
• 4 years ago

## Measuring Play

Videos about different measuring units and conversions.

## Fractions - multiply & divide, and more Play

First, we learn about simplifying fractions. Then come various topics about fraction multiplication: multiplying fractions by whole numbers, or by fractions, or multiplying mixed numbers. One video is about area and fraction multiplication. Lastly, fraction division topics: divide fractions mentally, or using the rule (involving reciprocal numbers).

## Decimal arithmetic Play

These videos go through all of the important decimal arithmetic: adding, subtracting, multiplying, dividing, comparing and rounding decimals, plus some problem solving. Great for grades 5, 6, and 7.