**Math Help Page**

On this page you will find resources and links to videos I've selected from sites like The Khan Academy and Math Playground to demonstrate concepts. Hope they are helpful!

## Place Value, Order of Operations, and Exponents

- Place Value (Khan Academy) --a demo of place value concepts; helpful for students who have trouble recognizing that the "9" in 398 represents 90 or 9x10 or 9 tens, not just 9)
- Subtraction with Trading (Khan Academy) --helps students who struggle with trading before subtracting
- Order of Operations: PEDMAS (Math Playground)
- Order of Operations (Khan Academy)

- Meaning of Exponents (Khan Academy) --basic overview
- Scientific Notation (Khan Academy) --what is it and how to write in it

## Multiplication of Whole Numbers

- Learning Basic Multiplication Facts (Math Playground) --fantastic run-through of the basic multiplication table.
- Multiply by a 1-digit number (Math Antics) --fun demo using the standard algorithm
- Multiplication: 2 digit by 1 digit (Khan Academy) --using the U.S. traditional algorithm
- Multiplication: 2 digit by 2 digit (Khan Academy)
- Multiplication: Multi-digit Numbers (Khan Academy)
- 50 Facts Tests: download copies of the timed multiplication tests we use to practice instant multiplication fact recall. All 4 versions of the test are here!
- Fact Triangles: practice multiplication and division facts. They are better than flash cards because they teach the multiplication AND division relationship together. Print and cut out the triangles. Cover the large number for multiplication practice. Cover one of the smaller numbers for division practice. Hope this helps!

## Division of Whole Numbers

- What is Division? --an essential walk-through of what it means to divide.
- Division using Partial Quotients (Khan Academy) --a great way to first learn division. The Partial Quotients method helps students learn their extended multiplication facts.
- How to do Long Division (Math Playground) --with the US Standard Algorithm and an explanation of why it works.
- Long Division Basics (Khan Academy) --how to use the U.S. long division algorithm.
- US Standard Long Division (Khan Academy) --in action.

**Alternative Algorithms**

Click here for examples and explanations of some alternative algorithms students may use when solving addition, subtraction, multiplication, and division problems. They're pretty cool!

## Addition, Subtraction, Multiplication, and Division of Decimals

- Adding Decimals (Khan Academy)
- --helps students with lining up place values when adding decimals.
- Subtracting Decimals (Khan Academy)
**Multiplying Decimals (Math Playground)**--excellent demonstration of decimal multiplication with a concrete explanation of why you ignore the decimals.- Multiplying Decimals (Khan Academy) --this video uses the U.S. traditional multiplication algorithm to multiply numbers with decimals..
- Multiplying Decimals 2 (Khan Academy) --same as above, only with more digits.

## Addition and Subtraction of Fractions

**Adding Fractions (Math Playground)**--very, very clear demonstration of finding a common denominator, making equivalent fractions, and then adding- Adding Fractions with Different Denominators (Khan Academy) --another clear demonstration of the above steps
- Adding Mixed Numbers (Khan Academy)
- Adding Mixed Numbers with Different Denominators (Khan Academy)
- Subtracting Mixed Numbers (Khan Academy)
- Subtracting Mixed Numbers by Changing to Improper Fractions (Khan Academy)

## Reducing, Comparing, and Converting Fractions

**Comparing and Ordering Fractions (Math Playground)**--using a drawings and equivalent fractions- Comparing Fractions (Khan Academy) --simplifying and finding equivalent fractions to compare them
- Converting Mixed Numbers to Improper Fractions (Khan Academy)
- Converting Improper Fractions to Mixed Numbers (Khan Academy)
- Equivalent Fractions (Khan Academy) --demonstrates two ways to find an equivalent fraction, by either drawing a diagram or by finding a fraction of a number

- Finding Least Common Denominators (Khan Academy)
- Finding a Fraction of a Number (Math Playground) --helps you find things like "two-thirds of 24"
**Reducing Fractions (Math Playground)**--demonstrates two ways to simplify fractions, by either listing factors or finding all prime factors- Reducing Fractions (Khan Academy) --how to reduce fractions to simplest terms by drawing a diagram

## Multiplication of Fractions

- Multiplying Fractions (Khan Academy) *
- Multiplying Fractions and Whole Numbers (Khan Academy) *
- Multiplying Mixed Numbers via Improper Fractions (Khan Academy) *

## Converting Units of Measurement

- The Metric System (Math Playground) --clear explanation of how to use the metric system.
- Converting Units of Measurement (Khan Academy) --this video demonstrates how to convert 300 yards to miles. Helpful for students who don't know when to divide or multiply when converting measurement units.

## Volume and More

- Properties of Quadrilaterals (Khan Academy)
- Finding the Volume of a Cube (Math Made Easy)
- Finding Volume using unit cubes (LearnZillion)

- Area and Perimeter (Khan Academy) --of rectangles and triangles.
- Mean, Median, and Mode in Data (Khan Academy)
- Negative Numbers (Khan Academy) --great explanation of what negative numbers are and how they're used.
- Negative Numbers: Adding (Khan Academy)
- Negative and Positive Numbers: Adding (Khan Academy)
- Negative Numbers: Adding and Subtracting (Khan Academy)
- Prime Factorization
- Rounding Whole Numbers