Adding And Subtracting Integers Worksheet Page 8
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12Adding and Subtracting Integers
ACTIVITY 1.2
continued
Changing Elevations
Changing Elevations
SUGGESTED LEARNING STRATEGIES: Self Revision/Peer
Revision, Look for a Pattern, KWL, Group Presentation
My Notes
19. Use the patterns that you noticed to write rules about adding
integers. Include an example in your explanation.
a. A positive integer plus a positive integer.
b. A negative integer plus a negative integer.
c. A negative integer plus a positive integer.
d. A positive integer plus a negative integer.
e. An integer and its opposite
Now consider subtracting integers.
EXAMPLE 3
Find the diff erence: -4 - (-2)
Use this number line to follow along with this example.
–8
–6
–4
–2
0
2
4
6
8
Step 1:
Start at -4.
Step 2:
Face the negative direction (left ).
Step 3:
Since the 2 is negative, take 2 steps backward (to the right).
Th e answer is -2.
Solution:
18
®
TM
SpringBoard
Mathematics with Meaning
Level 2
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