*Macmillan Science Library: Mathematics*. Copyright © 2001-2006 by Macmillan Reference USA, an imprint of the Gale Group. All rights reserved.

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## Addition, Subtraction, Multiplication, and Division with Algebra Tiles

Addition is the simplest operation to do with algebra tiles. Just draw tiles for each term and then cross out zero pairs until no zero pairs remain. The total number of tiles that are left over is the answer, as shown in examples(a) through (c) of Figure 2.

Addition and subtraction are opposites. Whereas the strategy for addition is to remove zero pairs, the strategy for subtraction is to insert zero pairs. To subtract, start by drawing tiles for the first term, and then take away the amount to be subtracted, as shown in examples (d) through (g) of Figure 2.

If a closet measures 3 feet by 4 feet, then one might quickly sketch a rectangle with sides measuring 3 units and 4 units. Multiplication with algebra tiles uses the same concept. The length and width are the factors, and the area is the...

This section contains 889 words(approx. 3 pages at 300 words per page) |