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# Free 4th grade math video lessons

This is a collection of free math videos for 4th grade, showing varied exercises for each topic. They match Math Mammoth Grade 4 curriculum but will also work no matter which curriculum you follow (in other words, the videos don't rely on you having Math Mammoth curriculum).

Please choose a topic from the list. Please realize this is not a complete coverage of all 4th grade math. There isn't (yet) a video for every lesson in Math Mammoth Grade 4 curriculum, and I hope to add to the collection in the future. Also, some of the videos are older work of mine, but listed here in case they are still helpful to some.

## Chapter 1: Addition, subtraction, rounding, and graphs

Bar Models in Addition and Subtraction Problems

The Order of Operations

Making a Bar Graph

Rounding

Estimating

Calculate and Estimate Money Amounts

Calculate and Estimate Money Amounts: word problems

## Chapter 2: Large Numbers and Place Value

Adding and Subtracting Big Numbers

Rounding and Estimating with Large Numbers

Multiples of 10, 100, and 1000

## Chapter 3: Multi-Digit Multiplication

Scales Puzzles (2 videos)

Multiply in Parts 1 – 2-digit by 1-digit multiplication

Multiply in Parts 2 – partial products algorithm for 3-digit numbers and money amounts

Estimating in Multiplication

Multiplying in Columns - the Easy Way — 1-digit by 2,3,4-digit multiplication; standard algorithm

Order of Operations Again

Money and Change & money word problems (2 videos)

So Many of the Same Thing

Multiply by Whole Tens in Columns — aka a shortcut for 2-digit multiplication when one factor is a multiple of ten

The Standard Multiplication Algorithm With a Two-Digit Multiplier — aka two-digit multiplication, and why we add a zero on the 2nd line (2 videos)

## Chapter 4: Time and Measuring

Time Units

Elapsed Time 1

Videos for measurement units are found on this page. You can also use these shortcut links:

Measuring Temperature — Celsius and Fahrenheit degrees

Measuring Length (to the nearest 1/8 inch and in cm/mm)

Feed, Yards, and Miles (conversions between inches, feet, and yards)

Metric Units for Measuring Length (from millimeter to kilometer)

Customary Units of Weight

Metric Units of Weight

Metric Units of Volume

## Chapter 5: Division

The Order of Operations and Division

The Remainder, Part 1

The Remainder, Part 2 – we learn to write division with a different symbol and learn about the remainder in word problems

How to Teach Long Division – this video is for the teacher only

Long Division — step-by-step examples (several videos)

Remainder Problems – word problems involving long division with a remainder

Concept of average

Finding Fractional Parts with Division

Divisibility (and factors & multiples)

Prime Numbers

Finding Factors

## Chapter 6: Geometry

Videos for 4th (and 5th) grade geometry are found on the same page. You can also use these shortcut links:

Review: Area and Perimeter

Lines, Rays, and Angles

Drawing Angles (How to use the protractor)

Estimating Angles

Parallel and Perpendicular Lines (how to draw a right angle and a rectangle)

Parallelograms

Triangles

## Chapter 7: Fractions

Mixed Numbers and Fractions

Adding Mixed Numbers (with like fractional parts)

Equivalent Fractions

Subtracting Fractions and Mixed Numbers (2 videos)

Multiplying Fractions by Whole Numbers (2 videos)

## Chapter 8: Decimals

Decimals Numbers — Tenths — tenths

Adding and Subtracting with Tenths

Two Decimal Digits — Hundredths (2 videos)

Add and Subtract Decimals in Columns (2 videos)

Add and Subtract Decimals Mentally (2 videos)

Back to all videos index