Math Mammoth Grade 3 videos
Free math lessons for 3rd grade
This is a collection of free math videos for 3rd grade that both explain the math topic and show a variety of exercises. They match Math Mammoth Grade 3 curriculum but will also work no matter which curriculum you follow.
The videos are useful for several purposes:
- As a parent or teacher, you can let your student(s) watch the video for their math lesson.
- As a learner, you can learn these topics yourself.
- As a teacher, you can use them as lesson plans for teaching these topics. Often, one video can be made into several lessons with students.
Math Mammoth Grade 3, 2018 edition
Chapter 1: Addition & subtraction
Mental addition — several strategies explained
Review: mental subtraction — several strategies explained
More mental subtraction — more strategies explained
More mental subtraction: Unknown in an addition or subtraction
More mental addition (3-digit numbers)
Mental subtraction with three-digit numbers
(An older video about mental addition and subtraction with 3-digit numbers)
Rounding two-digit numbers to the nearest ten
Regrouping twice in subtraction
Regrouping in subtraction with zero tens
Three-digit subtraction word problems and a puzzle
The connection with addition and subtraction
The order of operations — parenthesis, addition & subtraction only
Chapter 2: Multiplication concept
Multiplication on a number line
Multiplication in two ways (multiplication is commutative)
Understanding multiplication word problems, part 1
Understanding multiplication word problems, part 2
The order of operations, part 2 — parentheses, multiplication, addition & subtraction
Chapter 3: Multiplication tables
I offer a full list of videos for the multiplication tables, which have been put together on this page.
Chapter 4: Telling time
Telling time: "past" and "till" (review from 2nd grade)
Using a calendar (future or past dates)
Chapter 5: Money
Word problems with money and change
Chapter 6: Place Value
4-digit place value (thousands) and expanded form
Addition and subtraction with 4-digit numbers — mental math
Rounding 3 and 4-digit numbers to the nearest hundred
Add and subtract 4-digit numbers — a lesson on estimation
Chapter 7: Geometry
More about area: Area of rectangles and the distributive property
Problems to solve: area of rectangles
Area and perimeter problems — rectangular shapes
Chapter 8: Measurement
Measuring to the nearest fourth-inch
Pounds and ounces (on a kitchen scale)
Grams and kilograms (on a kitchen scale)
Cups, pints, quarts, and gallons
Chapter 9: Division
The connection between multiplication and division
Divide evenly into groups — basic concept of division
Division versus multiplication word problems
Chapter 10: Fractions
Mixed numbers with visual models, and on a number line
Comparing fractions, part 1 (two videos)
Math Mammoth Grade 3, 2024 edition
Chapter 1: Addition & subtraction
Addition Facts Review
See this page for videos from 1st and 2nd grades.
Review: Subtraction Facts
See this page for videos from 1st and 2nd grades.
Subtraction Strategies, Part 1
Subtraction Strategies, Part 2
Difference — you can use this video to review the concept of difference from 2nd grade as necessary.
Mental Math with Three-Digit Numbers (2-3 videos)
- More mental addition
- Mental subtraction with three-digit numbers
- Optionally: More Mental Addition and Subtraction (3-digit numbers)
The Connection with Addition and Subtraction
Chapter 2: Regrouping and Rounding
Rounding two-digit numbers to the nearest ten
How to check addition problems
Regrouping twice in subtraction
Regrouping in subtraction with zero tens, part 1
Regrouping in subtraction with zero tens, part 2
The order of operations — parenthesis, addition & subtraction only
Chapter 3: Multiplication concept
Understanding word problems, part 1
Understanding word problems, part 2
The order of operations 2 — parentheses, multiplication, addition & subtraction
Chapter 4: Multiplication tables
I offer a full list of videos for the multiplication tables, which have been put together on this page.
Chapter 5: Time
Telling time: "past" and "till" (review from 2nd grade)
Using a calendar (future or past dates)
Chapter 6: Money
Word problems with money and change
Chapter 7: Place Value
4-digit place value (thousands) and expanded form
Addition and subtraction with 4-digit numbers — mental math
Rounding 3 and 4-digit numbers to the nearest hundred
Add and subtract 4-digit numbers — a lesson on estimation
Chapter 8: Division
The connection between multiplication and division
Divide evenly into groups — basic concept of division
Division versus multiplication word problems
Chapter 9: Measurement
Measuring to the nearest fourth-inch
Grams and kilograms (on a kitchen scale)
Pounds and ounces (on a kitchen scale)
Cups, pints, quarts, and gallons
Chapter 10: Geometry
More about area: Area of rectangles and the distributive property
Problems to solve: area of rectangles
Area and perimeter problems — rectangular shapes
Chapter 11: Fractions
Mixed numbers with visual models, and on a number line
Comparing fractions, part 1 (two videos)