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October 18, 2012 Representing INTEGERS
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Positive INTEGERS (+) KEY WORDS: “go UP” “Earn” “Rose / Rise” “Increase” “Gained” “In” “Ascend” “Above Zero”
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Negative INTEGERS (-) KEY WORDS: “Down” “Spend” “Fell / Dropped” “Decrease” “Lost” “Out” “Descend” “Below Zero”
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Representing INTEGERS (-) or (+) EX 1: All of the following situations below can be represented by the integer 18, except which one? a)The population increased by 18. b)Jon earned $18 by pet sitting c)18 gallons of water flowed out of the water tank. d)The football team gained 18 yards.
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Representing INTEGERS (-) or (+) EX 2: A company produced 5,000 shoelaces in 5 hours on Monday. On Tuesday, it produced 5,250 shoelaces in 5 hours. Which integer represents the CHANGE in number of shoelaces produced from Monday to Tuesday? a)250 b)25 c)-25 d)-250
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Representing INTEGERS (-) or (+) EX 3: A hawk flew up to a height of 46 feet and then dove 18 feet toward the ground. Which integer describes the hawk’s height now? a)64 b)28 c)-28 d)-64
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Representing INTEGERS (-) or (+) EX 4: Nicole went snow skiing. When she left the slopes on Saturday, the temperature was - 3˚. The temperature dropped 11 degrees by the time the sun went down that evening. What was the temperature when the sun went down? a)8˚ b)-8˚ c)-11˚ d)-14˚
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Representing INTEGERS (-) or (+) EX 5: A submarine descended 300 feet below sea level and then descended another 800 feet. What is the final depth of the submarine? a)1,100 ft b)500 ft c)-500 ft d)-1,100 ft
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Representing INTEGERS (-) or (+) EX 6: At 6 a.m. the temperature was 4˚ below zero. By noon, the temperature had increased 10 degrees. What was the temperature at noon? a)- 14˚ b)8˚ c)- 4˚ d)6˚
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Representing INTEGERS (-) or (+) EX 7: Sean borrowed $19 from his Dad. On Saturday he gets a $5 allowance for his weekly chores. What integer describes his financial situation now? a)24 b)14 c)-14 d)-24
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