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Module 7.2 Lesson 6.notebook
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10/8/15Module 2, Lesson 6
HW: Lesson 6 Problem Set
The Distance between two rational numbers
Module 2 Lesson 5 Sprint 2
Module 7.2 Lesson 6.notebook
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Lesson 5 Day 2 Hw Answers:1.) -5 2.) 6
Subtract:
3.) -10 4.) 5 5.) -4 6.) 24
7.) 0 8.) 46 9.) -1 10.) 42
11.) -6 12.) -26 13.) 30 14.) -5
Evaluate the expression x - y for each set of values.
15.) 16 16.) -22 17.) 7
18.) 0 19.) 39 20.) -5
21.) 4
22.) 7
S.38
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Discussion:
1.) In life, at any given moment, will we always be able to use a number line to find the distance between two rational numbers? Is it the most efficient way to calculate distance between two points?
2.) What represents the distance between a number and zero on the number line?
3.) If the distance between 5 and 0 can be calculated using 5 - 0 or 5 , do you think we might be able to calculate the distance between -4 and 5 using absolute value?
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To find distance on the number line
To find distance, we find the absolute value of the difference of the two numbers.
ABS(8 3) = ABS(8 + 3) = ABS(5) = 5
Since the temperature increased, the change would be 33 degrees
What is the distance between -8 and -3?
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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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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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CLOSING:• How can we use a number line to find the distance between two
rational numbers?
• What does it mean to find the absolute value of a number ?
• Is it possible to use absolute value to find distance between a number, p, and another number, =, that isnot zero ? If so how?
• Is distance always positive? Is change always positive?
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