Addition
435+335
770
300-250
50
8*8
64
90+32
122
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 them.
The distance between them is...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.
He is right!
-35+27
-8
35-(-60)
95
32*-21
-672
-98+50
-48
Harry was playing 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
45
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 negatives equal a positive when multiplied.
Times negative five is -720, since different signs equal a negative when multiplied.