unit 3. » in colorado the temperature was -2 °f in the morning. if the temperature dropped 7°f,...
TRANSCRIPT
![Page 1: Unit 3. » In Colorado the temperature was -2 °F in the morning. If the temperature dropped 7°F, what is the temperature now?](https://reader036.vdocuments.site/reader036/viewer/2022062321/56649f1c5503460f94c3269e/html5/thumbnails/1.jpg)
Subtracting Integers
Unit 3
![Page 2: Unit 3. » In Colorado the temperature was -2 °F in the morning. If the temperature dropped 7°F, what is the temperature now?](https://reader036.vdocuments.site/reader036/viewer/2022062321/56649f1c5503460f94c3269e/html5/thumbnails/2.jpg)
Warm-Up
»In Colorado the temperature was -2 °F in the morning. If the temperature dropped 7°F, what is the temperature now?
![Page 3: Unit 3. » In Colorado the temperature was -2 °F in the morning. If the temperature dropped 7°F, what is the temperature now?](https://reader036.vdocuments.site/reader036/viewer/2022062321/56649f1c5503460f94c3269e/html5/thumbnails/3.jpg)
Lesson Objective
»The student will be able to: ˃Subtract integers.˃Represent integer
subtraction using models.
![Page 4: Unit 3. » In Colorado the temperature was -2 °F in the morning. If the temperature dropped 7°F, what is the temperature now?](https://reader036.vdocuments.site/reader036/viewer/2022062321/56649f1c5503460f94c3269e/html5/thumbnails/4.jpg)
Subtracting Integers Using Counters
» Negative- RED» Positive- YELLOW» Zero Pair˃ A number and its opposite˃ Have a sum of zero˃ Turn and Talk
+-
![Page 5: Unit 3. » In Colorado the temperature was -2 °F in the morning. If the temperature dropped 7°F, what is the temperature now?](https://reader036.vdocuments.site/reader036/viewer/2022062321/56649f1c5503460f94c3269e/html5/thumbnails/5.jpg)
Using CountersZERO PAIRS
5 - 3 =
+++++
![Page 6: Unit 3. » In Colorado the temperature was -2 °F in the morning. If the temperature dropped 7°F, what is the temperature now?](https://reader036.vdocuments.site/reader036/viewer/2022062321/56649f1c5503460f94c3269e/html5/thumbnails/6.jpg)
Using CountersZERO PAIRS
5 - 3 = 2
++
![Page 7: Unit 3. » In Colorado the temperature was -2 °F in the morning. If the temperature dropped 7°F, what is the temperature now?](https://reader036.vdocuments.site/reader036/viewer/2022062321/56649f1c5503460f94c3269e/html5/thumbnails/7.jpg)
Using CountersZERO PAIRS
3 - 5 =
+ + +
Bring in zero pairs
![Page 8: Unit 3. » In Colorado the temperature was -2 °F in the morning. If the temperature dropped 7°F, what is the temperature now?](https://reader036.vdocuments.site/reader036/viewer/2022062321/56649f1c5503460f94c3269e/html5/thumbnails/8.jpg)
Using CountersZERO PAIRS
3 - 5 = -2
![Page 9: Unit 3. » In Colorado the temperature was -2 °F in the morning. If the temperature dropped 7°F, what is the temperature now?](https://reader036.vdocuments.site/reader036/viewer/2022062321/56649f1c5503460f94c3269e/html5/thumbnails/9.jpg)
Using CountersZERO PAIRS
3 – (-5) =
+ + +-- -
+ + +
--
+ +
Bring in zero pairsBring in zero pairs
![Page 10: Unit 3. » In Colorado the temperature was -2 °F in the morning. If the temperature dropped 7°F, what is the temperature now?](https://reader036.vdocuments.site/reader036/viewer/2022062321/56649f1c5503460f94c3269e/html5/thumbnails/10.jpg)
Using CountersZERO PAIRS
3 – (-5) =
+ + +-- -
+ + + + +
8
![Page 11: Unit 3. » In Colorado the temperature was -2 °F in the morning. If the temperature dropped 7°F, what is the temperature now?](https://reader036.vdocuments.site/reader036/viewer/2022062321/56649f1c5503460f94c3269e/html5/thumbnails/11.jpg)
Modeling Activity
A B
![Page 12: Unit 3. » In Colorado the temperature was -2 °F in the morning. If the temperature dropped 7°F, what is the temperature now?](https://reader036.vdocuments.site/reader036/viewer/2022062321/56649f1c5503460f94c3269e/html5/thumbnails/12.jpg)
Discussion
» How did the models help you subtract integers?
»What rules or patterns did you notice about subtracting integers?
» You can always draw your own counters if you do not have counters available
![Page 13: Unit 3. » In Colorado the temperature was -2 °F in the morning. If the temperature dropped 7°F, what is the temperature now?](https://reader036.vdocuments.site/reader036/viewer/2022062321/56649f1c5503460f94c3269e/html5/thumbnails/13.jpg)
Subtracting Integers
»RULE˃Keep it, Change it, Change it˃Then follow addition rules