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
5.37 + 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
-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
How is multiplying and dividing rational numbers similar to multiplying and dividing integers?
The same rules for signs of integers are applied to rational numbers.
3 - 14 - (-12)
- 29
-2 2/5 - (-3 1/2)
5 9/10 or 5.9
Tell whether the expression is positive or negative without evaluating.
-6/5-:(-1/2)*6.3*(-0.6)-:2/3*7 7/8-:100
negative
58 + - 27 + - 31
0
-38.1 + 2 1/2
-35.6 or -35 6/10