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# Free 4th grade math video lessons

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

## Chapter 2: Large Numbers and Place Value

## Chapter 3: Multi-Digit Multiplication

## Chapter 4: Time and Measuring

## Chapter 5: Division

## Chapter 6: Geometry

## Chapter 7: Fractions

## Chapter 8: Decimals

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.

Bar Models in Addition and Subtraction Problems

Calculate and Estimate Money Amounts

Calculate and Estimate Money Amounts: word problems

Adding and Subtracting Big Numbers

Rounding and Estimating with Large Numbers

Multiples of 10, 100, and 1000

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

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

Money and Change & money word problems (2 videos)

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)

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)

The Order of Operations and Division

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

Finding Fractional Parts with Division

Divisibility (and factors & multiples)

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 TrianglesAdding Mixed Numbers (with like fractional parts)

Subtracting Fractions and Mixed Numbers (2 videos)

Multiplying Fractions by Whole Numbers (2 videos)

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)