Rational Numbers
Define rational number
A number that can be written as a fraction
a/b or -a/b
25 + (-16)
9
6/7 + 3/7
9/7
Mr. Sahney runs up 6 flights of stairs. How far will Mr. Sahney will have to run down to represent an additive inverse
6 because 6 + (-6) = 0
Write 1/4 as a decimal
0.25
-(-5)
5
2/5 * 6/7
12/35
In the morning, the initial temperature was -30 degrees Fahrenheit.
In the afternoon, the temperature increased by 15 degrees Fahrenheit.
What was the final temperature?
-30 + 15
-15 degrees Fahrenheit
-|-20| =
-20
In a school exam, Rohan’s score was up to 500 points. Then he scored -100 points in the words category. What was his total score then?
400 points
4/15 divided by 2/3
12/30 = 2/5
John is scuba diving. He starts at sea level and then descends 5 feet in 2 1/2 minutes. Express John's descent as an integer
-5 divided by 2 1/2
-2
What is special about the reciprocal of a number
The product always equals 1
1. A deposit of $16
2. A loss of 11 yards
3. 10 degrees below zero
4. Profit of $50
1. 16
2. -11
3. -10
4. -50
6 2/3 divided by 1 1/3
5
The school environmental club made a poster to celebrate Earth Day. The poster was 7/8 yards long and 2/3 yards wide. What is the difference in the length and width of the poster
5/24 yards
The property are we using when we rewrite
5 - 5 as
5 + (-5)
35 ÷ 7 × (7 - 4) + 2
35 ÷ 7 × (7 - 4) + 2
35 ÷ 7 × 3 + 2
5 x 3 + 2
15 + 2
17
5 * 2 1/2
25/2
Define absolute value and give an example
The distance between a number and zero on a number line
|2| = 2
|-100| = 100
Answers may vary