Addition
8*(-8)
What is -64
Joe said -75+54 was 129. Is he wrong, and if so then explain his error and say the real answer to the problem.
What is yes, because he added 75+54 instead of -75+54, which is (-21)
-4 - (-4)
What is 0
15-(-34)
What is 49
-9*(-12)
What is 108
Joe was 2,000 feet above sea level. His friend Bob was 1,568 feet above sea level. Joe wanted to know what is the difference in altitude?
What is 432 feet.
-15 -(-17)
What is 2
-54-13
What is -67
Billy said -89+56 is -33. Is he right, and if so explain his error and right the right answer.
Yes, Billy is correct.
-35-(-60)
What is 25
Harry was playing football. He started at the twenty yard line. He got the ball, but lost ten yards. The next play he gained fifteen, and the next play he lost five. What yard is he at now?
What is 20 yard line.
-37*-12*-3
What is -1,332
-57+76+(-64)
What is (-45)
Sally says -12*-12*-5 is -720, but Sarah says -12*-12*-5 is 720. Who's right? Explain.
Sally is correct because -12*-12 is 144, since two likes equal a positive, times negative five is is -720, since differences equal a negative.