Vocabulary
A math tool used to display numbers in order.
Also used to find relationships in negative and positive numbers
What is a number line
A black chip represents what value
+1
x<2.5 means that I should have this type of circle when graphing
What is an open circle.
These numbers are missing
-14 -13 ___ -11 -10 ____ -8 -7
Use >,< or = to compare these numbers
25 _____ -25
What is >
25 > -25
Numbers on the left side of 0 in a number line
What is negative numbers
Adding this will not change the value of the board, but give you more chips to work with
What is zero pairs
The symbols in an inequality that tell me to shade to the right.
What is the greater than or greater than and equal to signs
This number is lower down on a vertical number line
+114 -113 -113.25
What is -113.25 is the lowest number.
Put these integers in order from least to greatest
-18, 10, +5, -11 1/2, 12
What is
-18, -11 1/2, +5, 10, 12
Numbers that are the same distance from zero
Answers will vary
Equal numbers of red and black chips
When reading an inequality the x really translates to this
Ex. x<2 (hint: I say it every time I read one in class)
What is "shade all the numbers " or "all the numbers"
If I start on -25 on a number line and add 13.
I finish at this number
What is +12
Use >,< or = to compare these numbers
-75 ____ -90
What is >
Since both numbers are negative, the one closest to zero is larger, -75 is the larger number.
Define integer
What is a set of numbers, their opposites and zero
Give the number sentence and answer for the chip board:
6 red chips and adding 20 black chips
-6++20=+14
True or False: When graphing an inequality I never have to use the number in the problem for anything.
Explain why you do or do no have to use it
What is false.
We use the number to put an open or closed circle. It tells us whether that number is part of the solution
The halfway number between -4 and 2
What is -1
Use >,< or = to compare these numbers
-4.3___-4.03
What is <
since both number are negative the number closest to 0 has a larger value ,-4.03.
Give 3 different examples of a rational number.
There are four types to choose from
A fraction, a decimal, repeating decimal, integer
Examples will vary.
Give the number sentence and answer for the following chip board:
4 red chips , remove 3 black chips
-4-+3=-7
List the steps to graph the following inequality
x<2.5
What is
1.Place open circle at 2.5
2. Shade to all the numbers to the left of 2.5 including arrow
Describe the location of the opposite numbers on a number line of these numbers:
-9 , 10.5 , 1/2, -5/2
Hint: Say what two numbers each number is in between of ex. 2 is between positive 1 and positive 3
What is:
-9's opposite is 9: is in between 10 and 8
10.5' opp is -10.5 is in the middle of -10 and -11
1/2's opposite is -1/2 is in the middle of -1 and -2
-5/2's opposite is 5/2 or 2.5, in the middle of 2 and3
Use >,< or = to compare these numbers
-3/5 _____ -3/6
What is <
-3/5 = -.6 -3/6 = -.5
The number closest to 0 is -.5, therefore it has a greater value