IXL | Multiply a decimal by a two-digit whole number using area models

Use the model to find

6.7

First, fill in the area of each rectangle.

0.7

Then, find the total area.

6.7

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Learn with an example

question

Use the model to find

7.1

First, fill in the area of each rectangle.

0.1

Then, find the total area.

7.1

solution

This model represents

7.1

as a big rectangle made of smaller rectangles. The side lengths of each smaller rectangle are shown.

0.1

Multiply the side lengths to find the area of each smaller rectangle.

420

0.1

0.4

Fill in the areas on the model.

0.1

420

0.4

Add the areas of the smaller rectangles to find the total area of the model.

420

0.4

454.4

The total area of the model is 454.4.

7.1

454.4

Looking for more? Try these:

Lesson: Multiplying decimals by whole numbers

Lesson: Area model multiplication

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Teacher tools

Work it out

Not feeling ready yet? These can help:

CC.5Multiply a decimal by a one-digit whole number

I.7Multiply 2-digit numbers by 2-digit numbers using area models

Lesson: Multiplying decimals by whole numbers

Lesson: Area model multiplication

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