This is a collection of free math videos for 3rd grade, showing varied exercises for each topic. They match Math Mammoth Grade 3 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).
These videos are usable for students, teachers, and parents. You can use them...
Please choose a topic from the list. Please realize this is not a complete coverage of all 3rd grade math, and I hope to add to the collection in the future.
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, also available from a non-YT platform)
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
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
I offer a full list of videos for the multiplication tables, which have been put together on this page.
Telling time: "past" and "till" (review from 2nd grade)
Using a calendar (future or past dates)
Word problems with money and change
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
More about area: Area of rectangles and the distributive property
Problems to solve: area of rectangles
Area and perimeter problems — rectangular shapes
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
The connection between multiplication and division
Divide evenly into groups — basic concept of division
Division versus multiplication word problems
Mixed numbers with visual models, and on a number line
Comparing fractions, part 1 (two videos)
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