Mathletes Fab Five 1) -12 + (-66) + (-48) 2) A football team receives a 5- yard penalty on one play...
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Transcript of Mathletes Fab Five 1) -12 + (-66) + (-48) 2) A football team receives a 5- yard penalty on one play...
Mathletes Fab Five1)-12 + (-66) + (-48) 2)A football team receives a
5-yard penalty on one play and a 10-yard penalty on the next. Write a sum of negative integer to represent this situation.
3)Eli had mini-golf scores of -3, -4, and -3. What was his total score for the three rounds?
1)-126
2)-5+ (-10)
3)-10
Adding Integers with Different
Signs
Lesson 1.2
• Start from 0• Positive go right• Negative go left• Answer is at
your final destination
Modeling on the Number Line
Examples:1.) 4 + (-3)
2.) -6 + 4
0 41
0-6 -2
= 1
= -2
Zero Pair: When you add a
positive integer and a negative integer the result is zero
1+( -1) =0
Example:
Vocabulary Word
One positiveOne negative
Cancels each other
• Group together your Zero Pairs• What is left over
is your answer
Modeling Using Red/Yellow Tiles
Examples:1.) 3 + (-2)
2.) -6 + 3
= 1
= -3
How do you add integers with different signs?
1. Find the absolute values2. Subtract the smaller absolute value
from the larger.3. Use the sign of the integer with the
greater absolute value.
Essential Question
Remember:
Different sign subtract
Keep the sign of the larger number
Examples:
1.) -51 + 20
2.) 13 + (-13)
3.) 10 + (-18)
4.) 25 + (-26)
Add the integers.
-31
-0
-8
-1
Homework
•Workbook Page 16-17• (#1-25 ALL)