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# Multiplication

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Author: Rachel Casto
##### Description:

I can multiply a multi-digit number by a single-digit number using partial products.

I can multiply a two-digit number by a two-digit number using partial products or the box method.

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Tutorial

## Key Vocabulary

multiply-repeatedly adding the same number (Example:  4 x 3 = 3 + 3 + 3 + 3)

factor-numbers you can multiply together to get another number; numbers can have many factors (Example: 1, 2, 3 and 6 are factors of 6 because 1 x 6 = 6 and 2 x 3 = 6)

product-the answer to a multiplication problem (Example:  FACTOR X FACTOR = PRODUCT)
*4th grade expectation-->limited to whole numbers less than or equal to 1,000,000

Students will be expected to multiply a one, two, three, or four-digit number by a one-digit number and multiply a two-digit number by a two-digit number.

## Below you will find resources to help students better understand how to multiply whole numbers.

MULTI-DIGIT BY SINGLE DIGIT--PARTIAL PRODUCTS

2 By 1 Digit Using Partial Products
(Source:  LearnZillion)

3 By 1 Digit Silent 'Watch and Learn'

MULTI-DIGIT BY SINGLE DIGIT--AREA MODEL

2 By 1 Digit Area Model

1 By 1 Digit Area Model
(Source:  LearnZillion)

TWO DIGIT BY TWO DIGIT--PARTIAL PRODUCTS

2 By 2 Digit Partial Products

2 By 2 Digit Partial Products (Box Method in second part of video)

Using Partial Products For Multiplication
(Source:  LearnZillion)

TWO DIGIT BY TWO DIGIT--AREA MODEL

Solve 2 By 2 Multiplication Problems
(Source:  LearnZillion)

Use Area Models For Multiplication
(Source:  LearnZillion)

TWO DIGIT BY TWO DIGIT--BOX METHOD

Partial Products Box Method

2 By 2 Digit Box Method

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