1. Day 21 Subtracting Rational Numbers.notebook October 15, 2012
AIM: Subtracting Rational Numbers
Do Now
For a to f, choose the value that is larger. Write a question
mark if there is too little information to decide.
a.) ­(­4) 4
b.) ­6 ­(­6)
c.) ­4 x
d.) Ι­4Ι ­Ι4Ι
e.) x + x x
f.) x ­x
f.) 5 = - ___ Is there any value you
can put to make this
equation true?
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2. Day 21 Subtracting Rational Numbers.notebook October 15, 2012
Anticipatory Set
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3. Day 21 Subtracting Rational Numbers.notebook October 15, 2012
Anticipatory Set
On Core Page 13
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4. Day 21 Subtracting Rational Numbers.notebook October 15, 2012
1.) The temperature changed from 5°F
at 6 P.M. to -2°F at midnight. What is
the difference in the two
temperatures?
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5. Day 21 Subtracting Rational Numbers.notebook October 15, 2012
2.) The high temperature one day was
-1°F. The low temperature was -5°
F.What was the difference between
the high and low
temperatures for the day?
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6. Day 21 Subtracting Rational Numbers.notebook October 15, 2012
3.) The record high temperature in
North Carolina is 110°F. The record low
temperature is -34°F. What is the
difference in these temperatures?
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7. Day 21 Subtracting Rational Numbers.notebook October 15, 2012
4.) The temperature at 6 P.M. was 15°
F. By 8 P.M. it had dropped 9 degrees,
and then by 10 P.M. it had dropped
another 11 degrees. What was the
temperature at 10 P.M.?
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8. Day 21 Subtracting Rational Numbers.notebook October 15, 2012
Grade: My Work: Explanation: Corrections:
The highest recorded temperature
on Earth was 126°F. The lowest was
-129°F. What is the difference
between the two temperatures?
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9. Day 21 Subtracting Rational Numbers.notebook October 15, 2012
1
Evaluate the following algebraic expressions.
-10 - 4 - x, for x = -2
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10. Day 21 Subtracting Rational Numbers.notebook October 15, 2012
2 Evaluate the following algebraic expressions.
20.3 - x + (-7), for x = 9
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11. Day 21 Subtracting Rational Numbers.notebook October 15, 2012
3 Evaluate the following algebraic expressions.
-1
+ x - (-4), for x = -7
3
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12. Day 21 Subtracting Rational Numbers.notebook October 15, 2012
4 Evaluate the following algebraic expressions.
-2 -1 , for x = 1
-x-
5 2 3
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13. Day 21 Subtracting Rational Numbers.notebook October 15, 2012
5 Evaluate the following algebraic expressions.
x + 0.25 - y, for x = -4.3 and y = 23
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14. Day 21 Subtracting Rational Numbers.notebook October 15, 2012
BEFORE YOU LEAVE
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15. Day 21 Subtracting Rational Numbers.notebook October 15, 2012
Homework
Castle Assignment #2 due
Tuesday
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16. Attachments
Random Adding Integers only.notebook