the university of texas at dallas. introduction to integers we can represent integers using red and...

Adding Integers

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INTRODUCTION TO INTEGERSWe can represent integers using red and

yellow counters.

Red circles will represent negative integers, and yellow circles will represent positive integers.

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Negative integer Positive integer

Zero PairIf we add one red and one yellow together

what do they equal?

0!!! So we call them a zero pair.

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Negative integer Positive integer+ = 0

INTRODUCTION TO INTEGERSThe diagrams below show 2 ways to

represent -3.

Represent -3 in 2 more ways.

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-3 -3

INTRODUCTION TO INTEGERSTell which integer each group of tiles

represents.

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-2 +1

ANSWER+2

INTRODUCTION TO INTEGERSIf there are the same number of red tiles as yellow tiles, what number is represented?

It represents 0. It has 3 zero pairs!The University of Texas at Dallas

ADDING INTEGERSWe can model integer addition with color counters.

Represent -2 with the fewest number of counters.

Represent +5 with the fewest number of color counters.

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ADDING INTEGERSWhat number is represented by combining the

2 groups of tiles?

Write the number sentence that is illustrated. -2 + +5 = +3

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+3

ADDING INTEGERSUse your red and yellow tiles to find each

sum.

-2 + -3 = ?

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ANSWER

+ = -5

-2 + -3 = -5

ADDING INTEGERS

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-6 + +2 = ?

+ = - 4

+ = +1

-3 + +4 = ?

ANSWER

ANSWER

-6 + +2 = -4

-3 + +4 = +1