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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 and writing simple expressions

Bar graph and problems

Rounding 4-digit numbers

Estimating the final result

Round and estimate money amounts

Money word problems

## Chapter 2: Large Numbers and Place Value

How to multiply a number by 10, 100, or 1000

## Chapter 3: Multi-Digit Multiplication Multiply in parts 1 (partial products) – 2-digit by 1-digit multiplication

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

Multiply 1-digit by 2,3,4-digit number – standard algorithm

Multiplying money amounts

Some money word problems

Shortcut for 2-digit multiplication when one factor is a multiple of ten

Two-digit multiplication and why we add a zero on the 2nd line

## Chapter 4: Time and Measuring

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

## Chapter 5: Division and divisibility The order of operations plus writing simple expressions

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

Remainder problems – word problems involving long division with a remainder

Concept of average

Find a fractional part of a quantity (using division)

Divisibility (and factors & multiples)

An introduction to 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 versus perimeter

Lines, rays, and angles

How to use the protractor

Estimating angles

How to draw a right angle and a rectangle

Parallelograms

Acute, obtuse, and right triangles

## Chapter 7: Fractions

Mixed numbers to fractions and vice versa

Adding mixed numbers with like fractional parts

Equivalent fractions

## Chapter 8: Decimals

Decimals: tenths

Two decimal digits: hundredths

Back to all videos index

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