GEOMETRIC MEASUREMENT AND DATA(for third grade)

Emily LongmanFebruary 12, 2014

Addition

MULTIPLICATION AND ADDITION OF AREA

Tiling Multiplication

REMEMBER:

In the last lesson, we learned that area can be measured using unit squares.

1 unit

1 unit

TILING

You can visualize unit squares by using tiles, like this one.

Click here to see how.

Click on the red unit squares (tiles) and watch how they cover the

entire surface of the rectangle.

c

Click on the red unit squares (tiles) and watch how they cover the

entire surface of the rectangle.You can add up the tiles you used – that number is your area:

Six tiles fit into this rectangle.

MULTIPLICATION

You can also multiply the side lengths

to find the area:

3 unit squares x 2 unit squares = 6 square units

Use the multiplicative property of area to find the area of the following examples.

Click on the correct answer:

A. 9B. 25C. 20D. 16

Yes! 5 x 4 = 20 units squared

No

5 x 4 = 20 units squared

A. 6B. 4C. 3D. 2

Yes! 3 x 2 = 6 units squared

No

3 x 2 = 6 units squared

A. 8B. 3C. 9D. 5

Yes! 3 x 3 = 9 units squared

No

3 x 3 = 9 units squared

A. 6B. 4

C. 10D. 5

Yes! 5 x 1 = 5 units squared

No

5 x 1 = 5 units squared

HOW DID YOU DO?• If you want more practice, you can go back to retake the quiz by clicking here:

• If you’re finished, you may click here to return to the main menu and review quietly:

SOURCES• Common Core Standard 3.MD.7.a-b• http://www.isbe.net/common_core/pls/level1/pdf/math-standards.pdf

• Office Clip Art• http://www.clker.com/clipart-answer-button.html• http://www.naturalnews.com/report_Health_Products_Discounts_0.html• http://3startiling.com.au/• http://heartofthematteronline.com/does-god-care-about-my-math-curriculum/• http://rhomany.org.uk/tag/tutorials-2/page/2/• http://excellencerehomes.com/2011/how-to-insert-the-click-to-continue-button-o

n-your-wordpress-site/• http://www.coolmath.com/prealgebra/06-properties/05-properties-distributive-01

.htm• http://vitaminsandjuice.com/distributor-bonus/• http://www.mrs-o-c.com/ied/warmupRulers.html