the university of texas at dallas. introduction to integers we can represent integers using red and...
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Adding Integers
The University of Texas at Dallas
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