5th Grade Math 4.4, Multiply Decimals by Whole Numbers Using Expanded Form & Area Models

We can use expanded form and place value to multiply a decimal by a whole number. We use expanded form to break apart factors to draw an area model and add their partial products. We can multiply decimal factors as if they were whole numbers, then use place value to insert the decimal point into the product. In an area model, one factor is arranged vertically and the other factor is arranged horizontally. Using an area model is related to using the Distributive Property because we break apart the factors. When we multiply the decimal numbers as if they were whole numbers, we can think of it as multiplying the decimal times 10 to convert it to a whole number. Then multiply it by one-tenth to change it back to a decimal. This means we need to multiply the product by 0.1 to convert it to a decimal. We solve three word problems involving multiplication of decimals by whole numbers.

4th Grade Math 3.3, Area Models and Partial Products for 2-digit Factors

5th Grade Math 4.1, Multiplication Patterns with Decimals

5th Grade Math 4.2, Model Multiplying Decimals by Whole Numbers

5th Grade Math 4.3, Multiplication with Decimals & Whole Numbers, Properties & Place Value

5th Grade Math Playlist

I'm using the Houghton Mifflin Go Math!
2015 copyright textbook for this playlist.
You can practice online using the textbook's website

YouTube rating for JoAnn's School videos:
L0 - No strong language
N0 - No nudity
S0 - No sexual situations
V0 - Not violent or disturbing
D0 - No drug reference or content
F0 - No flashing lights content

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