M2- 1.4 Subtracting Integers.notebook - Kyrene School District · M2 1.4 Subtracting...
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M2 1.4 Subtracting Integers.notebook 1 May 06, 2019 Page 49
Transcript of M2- 1.4 Subtracting Integers.notebook - Kyrene School District · M2 1.4 Subtracting...
M2 1.4 Subtracting Integers.notebook
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May 06, 2019
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M2 1.4 Subtracting Integers.notebook
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learning targets
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/ / #
Examples: Notes:
EQ: How can you use models to subtract integers?
M2- 1.4 Subtracting Integers with 2- Color Counters
4 - 2 = ____
4 - (-2) = ____
Subtracting Negative Numbers:1. Pull out chips to represent the FIRST
number.2. TAKE AWAY the SECOND number of
chips by circling them & drawing an AWAY arrow.
3. IF there aren't enough chips to take away, ADD ZERO PAIRS & then take away
> Add as many zero pair as needed.
+-
+-
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- +
+++++++
Subtracting Negative Numbers:1. Pull out chips to represent the
FIRST number.2. TAKE AWAY the SECOND number
of chips by circling them & drawing an AWAY arrow.
3. IF there isn't enough chips to take away, ADD ZERO PAIRS & then take away> Add as many zero pair as
needed.
+- Page 55
Whiteboards
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- +
-------
Subtracting Negative Numbers:1. Pull out chips to represent the
FIRST number.2. TAKE AWAY the SECOND number
of chips by circling them & drawing an AWAY arrow.
3. IF there isn't enough chips to take away, ADD ZERO PAIRS & then take away> Add as many zero pair as
needed.
+-
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- +
+++++++
+++++
-----
+-
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- +
-------- +- +- +- +- +
+-
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- +
++++
- +- +- +- +- +
= 9 +-
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- +
----- +
= 1+-
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- +
----
+-+-+-+-+-
= -9+-
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- += -1
++++
+-
+-Page 58
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Page 59- +
= -1
+-+-+-+-+-+-+-
+-
= 7
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+10
+-
-100
+100
+10+10++++50-50
-10 +10
-10 +10-10+10-10 +10
-5 +5---
+++
-50
-10
-10
-10
-10-5----
+100+5-50 -5-10 - + +50
99 (70) = ___-29
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+10
+-
123 221= _____
-100
+100
+10+10++++50-50
-10 +10
-10 +10-10+10-10 +10
-5 +5---
+++
+100+5-50 -5-10 - + +50
-98
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= 7
54 (23) = ___
+-
77
+10
+10
+10
+10
+10++++
-10 +10
-10 +10+-+- +-
-100-50 -10-5- + +5+10 +50+100
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+10
+-
123 221= _____
-100
+100
+10+10++++50-50
-10 +10
-10 +10-10+10-10 +10
-5 +5---
+++
+100+5-50 -5-10 - + +50
-98
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/ / #
Examples: Notes:
EQ: How can you use models to subtract integers?
M2- 1.4 Subtracting Integers with 2- Color Counters
4 - 2 = ____
4 - (-2) = ____
Subtracting Negative Numbers:1. KEEP the first number (WHOLE).
> DON'T TOUCH THE WHOLE!!!!2. WE DO NOT SUBTRACT INTEGERS...
WE ADD THE OPPOSITE!!!> Additive Inverse> Change the subtraction sign to an
addition sign.3. Change the 2nd number to its opposite.
> KEEP, CHANGE, CHANGE4. ADD the integers.
+-
2 - 4 = ____
4 + (-2) = ____
4 + 2 = ____
2 + (-4) = ____
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-9 + (2) =-7
-3 + 3 =0
-7 + (-5) =-12
24 + (-8) =
-16
-4 + (-2) =-2
5 + (-9) =-4
-20 + 30 =10
-10 + (-18) =
-28
change to the additive inverse &
then solve.
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3 + x = 74
2 + x = -7-9
45x - 5 = 40
x + 5 = 4035
-6 + x = 52
58
10x + 20 = -10
35x + 5 = 40
6 + x = 5246
-6 + x = -52-46
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DISTANCE CAN NEVER BE NEGATIVE!!!
-14 feet
277 feet
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/ / #
Examples: Notes:
EQ: How can you use models to subtract integers?
M2- 1.4 Subtracting Integers with 2- Color Counters
Absolute Value:• Find OVERALL distance by finding the
difference between 2 points on number line.• Perform operation inside bars
> Answer CANNOT be negative
|8-6|= ____
|6-8|= ____
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Remember!!
hw: practice & stretch pages 67-68
#1- only 1 model
