Adding And Subtracting Integers Worksheet Page 6
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12Adding and Subtracting Integers
ACTIVITY 1.2
continued
Changing Elevations
Changing Elevations
SUGGESTED LEARNING STRATEGIES: KWL, Group
Presentation, Think/Pair/Share, Close Reading
My Notes
TRY THESE A
Graph each inequality.
a. y < 6
–8
–6
–4
–2
0
2
4
6
8
b. s > -5
–8
–6
–4
–2
0
2
4
6
8
c. b ≥ -2
–8
–6
–4
–2
0
2
4
6
8
d. a ≤ 7
–8
–6
–4
–2
0
2
4
6
8
Some of the students were excited about going hiking on their fi eld
trip. Ms. Flowers knew that thinking about hiking could help the
students understand adding and subtracting integers. She explained
adding and subtracting integers using ideas related to hiking.
Integers without signs are
• Th e fi rst number in a problem is where you start your hike.
considered to be positive.
• Th e operation sign in the middle of the problem tells you
whether you are going to face in the positive direction or the
negative direction.
• Th e sign of the second number tells you if you are going to step
backward (-) or forward (+).
• Th e answer to the integer problem is where your hike ends.
EXAMPLE 2
Find the sum: -4 + (-2)
Use this number line to follow along with this example.
–8
–6
–4
–2
0
2
4
6
8
Start at -4.
Step 1:
Step 2:
Face the positive direction (right).
Step 3:
Since the 2 is negative, take 2 steps backward (to the left ).
Th e answer is -6.
Solution:
16
®
TM
SpringBoard
Mathematics with Meaning
Level 2
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