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Name: ____________________________________ Pg. 18 (#11-18) Write the sum shown by the arrows. #11 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 #12 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 #13 What is the sum of any integer and its opposite? #14 Identify a real-life situation where opposite quantities combine to make 0. #15 a) -21 + 25 = b) (-13) + (-21) = c) 46 + (-58) = d) (-39) + 16 = e) 28 + (-24) + (-3) = f) 15 + (-42) + (-5) = #16 A mountain climber camped at an elevation of 18,492 feet. The following day the climber descended 2,516 feet to another campsite. Write a numerical expression you can evaluate to find the elevation of the second campsite. Then find the elevation. #17 Explain how to determine if the sum of two integers with different signs is positive or negative. The sum will be positive if ________________________________________________________. The sum will be negative if ________________________________________________________. #18 If you stood at sea level, the base of the Hawaiian volcano Mauna Kea would be at the bottom of the ocean, at 19, 680 feet below you. The top would be 33, 476 feet above the base. Write a numerical expression you can evaluate to find the elevation of the top of Mauna Kea above sea level. Then find the elevation.