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Curated Video
Solving Real World Math Problems: Finding the Area of Rectangles
In this video, the teacher explains how to solve real-world math problems by finding the area of a rectangle. The concepts of multiplication, rows, columns, and units are used to determine the area of different shapes.
Curated Video
Finding the Area of a Rectangle: Counting Columns and Rows
In this lesson, students will learn how to find the area of a rectangle by counting columns and rows. They will use tiling as a strategy to partition the rectangle and determine the number of unit squares in each row and column. Through...
Curated Video
Solving for Unknown Amounts Using the Commutative Property of Multiplication
In this lesson, students will learn how to solve for unknown amounts using the commutative property of multiplication. They will understand that the order of the factors can be switched without changing the product.
Curated Video
Simplifying Expressions with Order of Operations
In this video, you will learn how to simplify whole number expressions using the order of operations. The lesson introduces the acronym GEMDAS, which stands for grouping, exponents, multiplication, division, addition, and subtraction, to...
Curated OER
Multiplication
A truly adorable video. Matthew, an upper grader, teaches little ones how to multiply. He shows multiplication as repeated addition, and explains what happens when you multiply a number by 1 and by 0. His explanations are clear and his...
Curated OER
Multiplication Tables
An instructor shows that with multiplication it is easier to multiply than to solve a problem through repeated addition. This is a very concrete example that shows both the reason and the rational behind multiplication.
Khan Academy
Khan Academy: Repeated Addition: Haircuts
Sal solves word problems by adding the same number many times. Includes a video, transcript, and question and answer section. [2:10]
Loyola University Chicago
Math Flix: Multiplication Table
This QuickTime movie provides an opportunity to identify patterns in the multiplication table. As you watch and listen to the teacher and student interact it helps clarify the thinking behind applying this concept.
Khan Academy
Khan Academy: Basic Multiplication
Provides a basic introduction to multiplication using drawings of equal groups and repeated addition. [13:20]
Khan Academy
Khan Academy: Intro to Multiplication
Demonstrates multiplication visually through the use of repeated addition and arrays. [3:32]
Sophia Learning
Sophia: Multiplication Tables
The lesson examine multiplication facts through thirteen. The video tutorial examines this concept using a multiplication table.
Khan Academy
Khan Academy: Repeated Addition: Haircuts
Demonstrates how to use repeated addition to count how many haircuts Rafael gets in one year. [2:09]
Curated Video
Algebra2go: Multiplication
Multiplication is demonstrated as repeated addition. Patterns within multiplication tables are revealed as addition and subtraction problems.
Art of Problem Solving
Art of Problem Solving: People Say That Repeated Addition Is Multiplication
Video uses examples to reinforce understanding of why repeated addition is multiplication. [1:48]
Art of Problem Solving
Art of Problem Solving: Of Means Multiply
Video tutorial explains why "of" means "multiply". [4:11]
Other
The Organic Chemistry Tutor: Number Series Reasoning Tricks
Video tutorial provides examples that explain how to find the next term in a number series. It gives reasoning tricks including fractions, addition and subtraction series, power series, and more. [14:43]
Khan Academy
Khan Academy: Multiplying 3 Digit by 1 Digit (Regrouping)
Learn to multiply a 3-digit number by a 1-digit number using regrouping. In this video, we will multiply 7x253.
Khan Academy
Khan Academy: Multiplication as Equal Groups
Sal Khan uses arrays and repeated addition to visualize multiplication. [3:32]
Khan Academy
Khan Academy: More Ways to Multiply
Sal Khan uses arrays and repeated addition to multiply. [5:28]
Khan Academy
Khan Academy: Multiplication Word Problem: Parking Lot
Sal Khan uses a picture and repeated addition to solve a multiplication word problem. [2:05]
Khan Academy
Khan Academy: Math: 3rd Grade: Multiplication as Repeated Addition
Multiplication as repeated addition.
Khan Academy
Khan Academy: Math: 3rd Grade: Multiplication as Equal Groups
uses arrays and repeated addition to visualize multiplication.
Khan Academy
Khan Academy: Math: 3rd Grade: More Ways to Multiply
Using arrays and repeated addition to multiply. [5:29]
PBS
Pbs: Odd Squad: Game Time!
Olive and Otto need to add multiple small numbers together in series. There's only one thing to do: go to the Mathroom.