Number Line
Negative numbers with chip models
Counters
Add or Subtract?
Anything
Find the Sum
Find the Difference
100
Draw a number line and show the work and answer to: -3 + 3
0
100
Draw a chip 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 zero?
4
100
Find the sum
4+16 =
20
100
3 - (-9) =
6
200
Draw a number line and show the work and answer to: -8 + - 5
-13
200
Draw a chip 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
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
400
Draw a number line and show the work and answer to: -9 + (-2)
-11
400
Draw a chip 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
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