NUMBEROCK
Equal Groups Multiplication Song | Repeated Addition Using Arrays
Video: Equal Groups (Repeated Addition Using Arrays) Grade Levels: 2nd Grade - 3rd Grade For 2nd Grade, using repeated addition to find the number of objects in an array sets the foundation for multiplication. By representing groups of...
Curated Video
Multiplication as Repeated Addition
In this video, students learn how to solve multiplication problems by writing them as repeated addition. The teacher explains the concept using examples and shows how multiplication is related to addition. Students are also introduced to...
Curated Video
Multiplication with Arrays
In this lesson, students will learn how to multiply by creating arrays. They will understand the concept of factors and products in multiplication number sentences. By using arrays, students will be able to visually represent and solve...
Curated Video
Using Skip-Counting to Solve Missing Number Puzzles
This video explains demonstrates the connection between skip-counting and repeated addition, as well as the relationship between addition and subtraction. The video provides strategies for identifying the pattern and determining the...
Curated Video
Multiplying Fractions by a Whole Number Using Visual Models
In this lesson, students will learn how to multiply fractions by a whole number using visual models. They will understand the concept of numerator and denominator in fractions and how they relate to the whole. By using visual...
Curated Video
Multiplying Fractions by a Whole Number: Repeated Addition
In this lesson, students will learn how to multiply fractions by a whole number using repeated addition. The teacher explains the concept of fractions as parts of a whole or a set, and demonstrates how to multiply fractions by adding the...
Curated Video
Solving Ratio Problems with Double Number Lines
This video explains how to solve ratio problems by setting up a double number line. It emphasizes the importance of correctly setting up the number lines and provides examples to illustrate the process. The video also introduces the...
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.