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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

Adding and subtracting large numbers

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:

Time units
Measuring temperature — Celsius and Fahrenheit degrees Measuring length to the nearest 1/8 inch and in cm/mm
Conversions between inches, feet, and yards
Metric units of length (from millimeter to kilometer)
Customary units of weight
Metric units of weight
Metric units of volume


Chapter 5: Division and divisibility

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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




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