Sheet # 80/ Positive and Negative Numbers
Name: ________________________ Date_____________
Explain and Show Your Work.
1) One Saturday in January, the temperature in Evanston, Illinois was - 9 degree C. On Sunday, the temperature had dropped to - 19 degrees C. How many degrees did the temperature drop?
2) it was - 15 degrees C yesterday and it is 5 degrees C today. How many degrees did the temperature increase?
3) Kim heated up water in science class. The temperature of the water was - 5 degree C when she started. Its temperature was 79 degree C when she stopped. By how many degrees did Kim raise the temperature of the water?
4) The high temperature on a December afternoon was - 5 degrees F. That night's low temperature was - 22 degrees F. By how many degrees did the temperature drop?
5) On January 1, 1975, the temperature in Billing, Montana, fell from 12 degrees C at 3 p.m. to - 15 degrees C at 11 p.m. By how many degrees did the temperature drop in those 8 hours?
Answers for sheet # 80
1) - 9 - (19) = - 9 + 19 = 10 degrees
2) 5 - (-15) = 5 + 15 = 20 degrees
3) 79 - (-5) = 79 + 5 = 84 degrees
4) - 5 - (-22) = - 5 + 22 = 17 degrees
5) 12 - (-15) = 12 + 15 = 27 degrees