Steps & Rules
Adding Rational Numbers
Subtracting Rational Numbers
I like to eat Appenges and Orples
100
What is the first step in subtracting this problem?
7 - 9
Keep the 7 the same, change subtraction to addition, make the 9 a negative
100
-7.824 + 23.5=
15.676
100
38.134 – 31.9=
6.234
100
What is the difference between a repeating and terminating decimal?
A repeating decimal will repeat at least one digit forever.
A terminating decimal will eventually stop and not go on forever.
200
When adding or subtracting with fractions, what do you have to make sure both fractions have first?
A common denominator
200
-14 + -8
-22
200
- 20 - (-4) =
-16
200
Convert the following fraction into its equivalent decimal. Is the decimal terminating or repeating?
2/11
Repeating
0.181818...
300
When adding or subtracting with a mixed number, what should it be turned into first?
An improper fraction
300
4 + (-3 1/2)
1/2
300
-3 3/4 - (-1/2)
-3 1/4
300
Represent the following problem on a number line (yes you have to draw it):
-6 - (-10)
*teacher check*
400
When adding rational numbers that have the same signs, what do I do with the absolute values? What sign does my answer have?
Add the absolute values
Keep the sign of both numbers
400
–33 + -4.5
-37.5
400
–3.37 – 9.668
-13.038
400
Simplify:
-5/6 - (-0.8)
-1/30
500
When adding rational numbers that have the different signs, what do I do with the absolute values? What sign does my answer have?
Subtract the absolute values
The answer has the sign of the number with the greater absolute value
500
2 1/2 + (-6 2/3)
-4 1/6
500
5/6 - (-5 1/3)
6 1/6
500
A scuba diver is 15.5 meters below sea level. She ascends 8.2 meters. What is her new position relative to sea level?
-7.3 meters