Number Line
Chips/Counters
Counters
Add or Subtract?
Anything
Find the Sum
Find the Difference
Vocabulary
100
Draw a number line and show the work and answer to: -3 + 3
0
100
Draw a chip/counter model to represent and answer: -7 + (-3)
-10
100
3 yellow counters + 2 Yellow counters =
5 (yellow counters) or 5
100
7 + (-2)=
5
100
What number could you add with -4 to get a zero pair?
4
100
Find the sum
4+16 =
20
100
3 - (-9) =
6
100
What is a zero pair?
A negative and a positive number that together make 0. Example -4 and +4 make 4 zero pairs
200
Draw a number line and show the work and answer to: -8 + - 5
-13
200
Draw a chip/counter model to represent and answer: -6 + 4
-2
200
5 red counters + 2 yellow counters =
3 yellow counters or 3
200
8 + (-1)=
7
200
What's the sum?
-2
200
-12 + 5 =
=-7
200
-19 - ( 15) =
-34
200
What is an integer?
The set of whole numbers and their opposites.
300
Draw a number line and show the work and answer to: 5 + - 15
-10
300
Write a number sentence (equation, with answer) to represent the model. 
6 + (-10) = -4
300
6 red counters + 3 red counters=
-9 (red counters)
300
(-2) + 2=
0
300
How many zero pairs are represented in the picture?
6
300
-16 + 17 =
1
300
71 - (-14) =
85
300
When you find a sum you are ________.
When you find the difference you are _____________.
Adding
Subtracting
400
Draw a number line and show the work and answer to: -9 + (-2)
-11
400
Draw a chip/counter model to represent and answer: -5 + (-3)
-8
400
5 red counters + 6 yellow counters =
1 (yellow counter)
400
(-10) + (-4)=
-14
400
Sarah wrote the equation 20 + -2 = 18 on her paper. She added two more numbers and her sum was still 18. What must be true about the two numbers that Sarah added.
They must be zero pairs, opposites, or additive inverses,.
400
-5 + (-13) =
-18
400
-14 - (14) =
-28
400
Adding a negative is the same as...
A) subtracting a positive
B) adding a positive
C) subtracting a negative
A
500
Draw a number line and show the work and answer to: -3 + 4
1
500
Write a number sentence (equation, with answer) to represent the model:
6 + -10 =-4 or -10 + 6 =-4
500
4 red counters + 6 red counters=
-10 (red counters)
500
(-12) +7 =
-5
500
Create a problem using a number line. The answer has to be -10
Call the teacher over to check your answer.
500
-8+(-4) =
-12
500
-8+(-4) =
-12
500
subtracting a negative is the same as...
A) adding a positive
B) subtracting a positive
C) Adding a negative
A