General Rules
When adding an integer and its opposite, you get...
a) a positive number
b) zero
c) a negative number
B
-16 + -35
-51
-5 3/4 + 2 1/2
-3 1/4
3/4 + 1/2
5/4 or 1 1/4
5.37 + 15.061
20.431
What is the rule for adding integers with the same sign?
a) The answer is always positive
b) Add the opposite
c) Add across and keep the sign
C
-32 - (-32)
0
-3 2/3 - 1 5/6
-5 1/2
-5/6 - 1/3
-7/6 or -1 1/6
-2.205 - 10.78
- 12.985
Subtracting a negative integer is like...
a) adding a positive integer
b) adding a negative integer
c) subtracting a positive one
A
- 147 + 17
- 130
2 2/5 + -3 1/2
-1 1/10 or -1.1
-1/3 - 4/9
-7/9
-7.824 + 23.5=
15.676
When subtracting a positive number from a negative number, the answer will always be...
a) positive
b) negative
c) zero
b
3 - 14 - (-12)
1
-2 2/5 - (-3 1/2)
11/10 or 1 1/10
3/7 + 3/14
9/14
–3.37 – 9.668
-13.038
When adding a positive and a negative integer, the answer will be...
a) always positive
b) always negative
c) depends on which number has the higher absolute value
c
58 + - 27 + - 31
0
-38.1 + 2 1/2
-35.6 or -35 6/10
-5/6 - 4/9
-23/18 or -1 5/18
–33.56 - (-4.5)
-29.06