Concept of multiplication and division

5 videos
6 skills
Let's introduce ourselves to two of the most fundamental ideas in all of mathematics: multiplication and division! Common Core Standards: 3.OA.A.1, 3.OA.A.2

Intro to multiplication

VIDEO 3:33 minutes
Use arrays and repeated addition to visualize multiplication. 

Multiplication as groups of objects

VIDEO 4:19 minutes
Use arrays to show different ways to multiply and get the same solution.

Meaning of multiplication

PRACTICE PROBLEMS
Interpret products of whole numbers, e.g., interpret 5 x 7 as the total number of objects in 5 groups of 7 objects each.

Multiplying 1-digit numbers

PRACTICE PROBLEMS
Multiply two 1-digit numbers. Some problems include multiplying by 10.

More on the concept of multiplication

VIDEO 5:29 minutes
Use arrays and repeated addition to multiply. 

The idea of division

VIDEO 8:01 minutes
Use an array and understanding of multiplication to divide.

Meaning of division

PRACTICE PROBLEMS
Use visual models to understand division.

Basic division

PRACTICE PROBLEMS
Divide two numbers.  Quotients are equal to or less than 10.

1-digit division

PRACTICE PROBLEMS
Find the missing number in division equations with one-digit quotients.

Examples relating multiplication to division

VIDEO 3:27 minutes
See the relationship between multiplication and division problems.

Relate division to multiplication

PRACTICE PROBLEMS
See the relationship between multiplication and division problems.