Addition
435+335
770
300-250
50
8*8
64
90+32
122
Joe said -75+54 was 129.Is he wrong, and if so then explain his error and say the real answer to the problem.
Yes, because he added 75+54 instead of -75+54, which is 21
4+(-4)
0
5-(-4)
9
-9*12
108
98-65
33
Joe was 2,000 feet above sea level. His friend Bob was 1,568 feet below sea level. Joe wanted to know what the distance was between thew. What was it?
3,568
-15+(-17)
(-2)
-54-13
41
-15*-7
105
40-(-57)
97
Billy said -89+56 is -33. Is he wrong, and if so explain his error and right the right answer.
no
-35+27
-8
35-(-60)
95
32*-21
-672
-98+50
-48
Harry was plying football.He started at twenty yards. 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?
20
-435+847
412
30-(-60)-32
58
-50*-12*-6
3,600
-57+76+-64
83
Sally says -12*-12*-5 is -720, but Sarah says -12*-12*-5 is 720. Who's right? Explain.
-720, because -12*-12 is 144, since two likes equal a positive, times five is is 720, since differences equal a negative.