1. Day 20 Subtracting Integers with Number Line.notebook October 12, 2012
AIM: Subtracting Integers with
the Number Line
Do Now
Add the following rational numbers.
2 1
a.) -2 3 + 12 b.) -2.3 + (-14.21)
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2. Day 20 Subtracting Integers with Number Line.notebook October 12, 2012
Homework was Castle
Learning Assignment #1
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3. Day 20 Subtracting Integers with Number Line.notebook October 12, 2012
Anticipatory Set
Answer the following question in a complete sentence.
1.) Predict how subtracting integers using a
number line will be different than adding
integers using a number line.
­10 ­9 ­8 ­7 ­6 ­5 ­4 ­3 ­2 ­1 0 1 2 3 4 5 6 7 8 9 10
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4. Day 20 Subtracting Integers with Number Line.notebook October 12, 2012
SUBTRACTING INTEGERS USING A NUMBER LINE:
­10 ­9 ­8 ­7 ­6 ­5 ­4 ­3 ­2 ­1 0 1 2 3 4 5 6 7 8 9 10
Pairs Check Activity:
-1 - 5 4 - 10
STOP: WAIT FOR THE OTHER PAIR TO FINISH AND
DISCUSS. DO NOT CONTINUE UNTIL INSTRUCTED TO!!!!!
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5. Day 20 Subtracting Integers with Number Line.notebook October 12, 2012
SUBTRACTING INTEGERS USING A NUMBER LINE:
­10 ­9 ­8 ­7 ­6 ­5 ­4 ­3 ­2 ­1 0 1 2 3 4 5 6 7 8 9 10
Pairs Check Activity:
3-9 -4 - 8
STOP: WAIT FOR THE OTHER PAIR TO FINISH AND
DISCUSS. DO NOT CONTINUE UNTIL INSTRUCTED TO!!!!!
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6. Day 20 Subtracting Integers with Number Line.notebook October 12, 2012
SUBTRACTING INTEGERS USING A NUMBER LINE:
­10 ­9 ­8 ­7 ­6 ­5 ­4 ­3 ­2 ­1 0 1 2 3 4 5 6 7 8 9 10
Pairs Check Activity:
-9 - (-12) 2 - (-10)
STOP: WAIT FOR THE OTHER PAIR TO FINISH AND
DISCUSS. DO NOT CONTINUE UNTIL INSTRUCTED TO!!!!!
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7. Day 20 Subtracting Integers with Number Line.notebook October 12, 2012
BIG IDEA
Subtracting integers is the same as adding the
additive inverse.
p – q = p + (-q)
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8. Day 20 Subtracting Integers with Number Line.notebook October 12, 2012
Evaluate the expression x - y for each set of values.
1.) x = 14, y = -2 2.) x = -11, y = 11 3.) x = -8, y = -15
­10 ­9 ­8 ­7 ­6 ­5 ­4 ­3 ­2 ­1 0 1 2 3 4 5 6 7 8 9 10
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9. Day 20 Subtracting Integers with Number Line.notebook October 12, 2012
Extra Practice
1.) -9 - 1 5.) -10 - (-15)
2.) 8 - (-9) 6.) 5 - 18
3.) -7 - (-3) 7.) -8 - 4
4.) 5 - 11 8.) 8 - (-7)
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10. Day 20 Subtracting Integers with Number Line.notebook October 12, 2012
Subtracting Integers
Grade: «grade»
Subject: «subject»
Date: «date»
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11. Day 20 Subtracting Integers with Number Line.notebook October 12, 2012
1
1.) -9 - 1
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12. Day 20 Subtracting Integers with Number Line.notebook October 12, 2012
2
2.) 8 - (-9)
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13. Day 20 Subtracting Integers with Number Line.notebook October 12, 2012
3
3.) -7 - (-3)
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14. Day 20 Subtracting Integers with Number Line.notebook October 12, 2012
4
4.) 5 - 11
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15. Day 20 Subtracting Integers with Number Line.notebook October 12, 2012
5
5.) -10 - (-15)
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16. Day 20 Subtracting Integers with Number Line.notebook October 12, 2012
6
6.) 5 - 18
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17. Day 20 Subtracting Integers with Number Line.notebook October 12, 2012
7
7.) -8 - 4
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18. Day 20 Subtracting Integers with Number Line.notebook October 12, 2012
8
8.) 8 - (-7)
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19. Day 20 Subtracting Integers with Number Line.notebook October 12, 2012
1.) The low point of the Tonga Trench, in the Pacific Ocean, is
-10,630 meters. The low point of the Mariana Trench, also in
the Pacific Ocean, is 890 meters lower. What is the depth of
the Mariana Trench?
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20. Day 20 Subtracting Integers with Number Line.notebook October 12, 2012
2.) The average surface temperature on Pluto is
-229°C. What would the temperature be if it was
currently 24 degrees lower than the average?
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21. Day 20 Subtracting Integers with Number Line.notebook October 12, 2012
Extra Practice
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22. Day 20 Subtracting Integers with Number Line.notebook October 12, 2012
BEFORE YOU LEAVE
Problem Meaning of Minus Sign
5 ­ 8 = x
x + 5 = ­2
Which is larger ­(­4) or ­4
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23. Day 20 Subtracting Integers with Number Line.notebook October 12, 2012
Mr. Tjersland's Math 7
Castle Homework due Tuesday 10/16/12
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24. Day 20 Subtracting Integers with Number Line.notebook October 12, 2012
AIM: Subtracting Integers
­10 ­9 ­8 ­7 ­6 ­5 ­4 ­3 ­2 ­1 0 1 2 3 4 5 6 7 8 9 10
-1 - 5 4 - 10
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25. Day 20 Subtracting Integers with Number Line.notebook October 12, 2012
­10 ­9 ­8 ­7 ­6 ­5 ­4 ­3 ­2 ­1 0 1 2 3 4 5 6 7 8 9 10
-9 - (-12) 2 - (-10)
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26. Attachments
Class Notes 11­8­06.doc
Class Notes 11­9­05.doc
Math in the News Project Outline.doc