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
Making a bar graph plus word problems
Calculate and estimate money amounts
Calculate and estimate money amounts: word problems
Chapter 2: Large Numbers and Place Value
Adding and subtracting large numbers
Rounding and estimating with large numbers - up to six digits
Multiples of 10, 100, and 1000
Chapter 3: Multi-Digit Multiplication
"Scales" (pan balance) problems (2 videos)
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
Estimating in multiplication: round the factors!
Multiplying in columns, the standard way — 1-digit by 2,3,4-digit multiplication; standard algorithm
Multiplying money amounts & 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)
Chapter 4: Time and Measuring
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)
Chapter 5: Division and divisibility
The order of operations plus writing simple expressions
The remainder, part 2 – we learn to write division with a different symbol and learn about the remainder in word problems
Long division — step-by-step examples (several videos)
Remainder problems – word problems involving long division with a remainder
Find fractional parts with division
Divisibility (and factors & multiples)
An introduction to prime numbers
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 Drawing angles (How to use the protractor) Estimating angles How to draw a right angle and a rectangle (for the lesson "Parallel and Perpendicular Lines" Parallelograms Triangles (acute, obtuse, and right)Chapter 7: Fractions
Adding mixed numbers (with like fractional parts)
Subtracting fractions and mixed numbers (2 videos)
Multiplying fractions by whole numbers (2 videos)
Chapter 8: Decimals
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)