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)
Regrouping Twice in Subtraction
Regrouping with Zero Tens, Part 2
Rounding 2-Digit Numbers to the Nearest Ten
The Connection with Addition and Subtraction
The Order of Operations — parenthesis, addition & subtraction only
Chapter 2: Multiplication concept
Multiplication on a Number Line
The Order of Operations 1 — multiplication, addition & subtraction
Understanding Multiplication Word Problems, Part 1
Understanding Multiplication Word Problems, Part 2
Multiplication in Two Ways (multiplication is commutative)
The Order of Operations 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
Review: Till and Past (review from 2nd grade)
Chapter 5: Money
Mental Math and Money Problems
Chapter 6: Place Value
Four-Digit Numbers and Place Value
Rounding to the Nearest Hundred
Chapter 7: Geometry
More Area and Perimeter Problems
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
Chapter 10: Fractions
Comparing Fractions 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
The Concept of 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
How to check addition problems
Regrouping twice in subtraction
Regrouping with zero tens, part 2
Addition, subtraction, and the parentheses
Chapter 3: Multiplication concept
The order of operations 1 — multiplication, addition & subtraction
Understanding word problems, part 1
Zero and one in multiplication
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 for Chapter 4 on this page.
The video for the lesson on partial products is also listed below.
Chapter 5: Time
Using "till" and "after" in telling time
Elapsed time 3 — using a number line to tell elapsed time
Chapter 6: Money
Using Mental Nath to Solve Money Problems
Finding the Total and the Change
Chapter 7: Place Value
Four-digit numbers and place value
Add and Subtract Four-Digit Numbers 1
Chapter 8: Division
Multiplication and Division Word Problems
Chapter 9: Measurement
Measuring to the nearest fourth-inch
Common metric units of length (Centimeters and Millimeters)
Grams and kilograms (on a kitchen scale)
Pounds and ounces (on a kitchen scale)
Cups, pints, quarts, and gallons
Chapter 10: Geometry
Area and perimeter problems — rectangular shapes
Chapter 11: Fractions
Comparing Fractions 1 (2 videos)
Comparing Fractions 2 — the same kind of parts or the same amount of parts
Comparing Fractions 3 — generic practice
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