1 and 1, 2 and 4, 5 and 5-1 and 4, -2 and 3, -2 and 14 and -1, 3 and -2, 1 and -2-3 and -1, -1 and -1, -2 and -3
In groups, decide which prompts are similar to each other. 1 and 4 are similar because it’s adding with the same sign. 2 and 4 are similar because it’s adding with opposite signs.
Prompts are combined to make 2 general prompts. Same signs – add and keep the sign. Opposite signs – subtract and keep sign of # with largest absolute value.
3 strategies students could use to add integers.
Transcript
1. When finding the sum of two negative
numbers, will the answer be negative, positive
or sometimes negative/sometimes positive?
Aaron – The answer will always be negative.
Betty – The answer will always be positive.
Clint – It depends on the numbers, sometimes it will
be positive but sometimes it will be negative.
I agree with Aaron/Betty/Clint because…
3. Unit Plan
Students will learn to…
Determine the signs when adding and subtracting
integers..
Represent addition of positive and negative
numbers using a number line.
4. What are the possible combinations of
addition problems?
Positive + Positive
Positive + Negative
Negative + Positive
Negative + Negative
5. Fold your notecard in half.
Write the following problems in the
designated area of your notecard.
Front Left
4 + 3
2 + 8
3 + 5
6. Front Right
4 + (-3)
2 +(- 8)
3 + (-5)
7. Back Left
-4 + 3
-2 + 8
-3 + 5
8. Back Right
-4 + (-3)
-2 + (-8)
-3 + (-5)
9. Bring your note card and notebook
Bring a pencil
We will model each problem together.
Write the answers on your notecard.
Make sure to get your negative sign, if needed.
10. Stay to the right
Walk in a line
Respect other classes by being quiet.
11. When finding the sum of two negative numbers, will the answer
be negative, positive or sometimes negative/sometimes positive?
Who do you agree with now? Explain
12. Anytime you add negatives, your answer is
always negative.
13. Write the following prompts…
A positive + positive means my answer is…
A positive + negative means my answer is…
A negative + positive means my answer is…
A negative + negative means my answer is…
14. In order to get a first down in football, the
offensive team must gain 10 yards. On their
first two plays, the Bears gained 5 yards and
then lost 5 yards. How many yards do they
need to gain on the third play to get a first
down?
Write the math sentence that describes this
situation.
Justify your response using math terminology.
15. Normal Temperatures for January(F)
1) Order the High temperatures from least to greatest.
2) Order the Low temperatures from least to greatest.
3) Which city has the highest average temperature?
City High Low
Barrow, Alaska -8 -20
Bismarck, N. Dakota 21 -1
Caribou, Maine 19 0
Duluth, Minn. 18 -1
Omaha, Nebraska 32 13
16. Opposites, Zero Pairs, Additive Inverse
Represent addition on a number line
Football field
Homework
Commutative Property of Addition
17. Students will learn to…
Demonstrate understanding of Opposites, zero pairs
and additive inverse.
Discover the rules for adding integers.
18. Blue whales swim to different areas of the ocean
depending on the water temperature. One whale
that was being tracked was swimming at 100 feet
below sea level. As the water he was swimming in
began to heat up, he moved down another 50 feet
below sea level.
1) Write a math sentence that represents this
scenario.
2) What is the blue whale’s depth?
3) The whale decided to return to sea level. Write a
math sentence that shows the entire journey.
20. Opposites, Zero Pairs, Additive Inverse
Representing addition on a number line.
Commutative Property
Quiz
21. Students will learn to…
Discover the rules for adding integers.
Discuss strategies for solving integers.
22. Your Goal:
Discover the rules for adding integers
The Process:
Analyze your notecards
Determine the rules for:
Adding integers with the same sign
Adding integers with the opposite sign
23. Which prompts are similar to each other?
1. A positive + positive means my answer is…
2. A positive + negative means my answer is…
3. A negative + positive means my answer is…
4. A negative + negative means my answer is…
25. Analyze the answers to the expressions.
1. When signs are the same…
2. When signs are opposite…
26. 43
Rule: To find the value of 43 , multiple 4 x 4 x 4
27. When your group has finished, stand up.
Meet with another group that has stood up.
Groups should take turns reading their rules
to each other.
If you agree, you may sit back down.
If you disagree, discuss and try to come to a
consensus.
28. When adding integers with the same sign…
When adding integers with the opposite
sign…
29. When adding integers with the same sign…
Add and keep the sign
When adding integers with the opposite
sign…
Subtract, keep sign of number with largest absolute
value (largest digit)
30. Number Line
Context
Money
Football
Others?
Rules for adding integers
31. Which strategy works best for you? Why?
At least 1 paragraph…
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