Transcript Step 1

Warm Up
Pg. 36 #’s 1-30 EVEN ONLY
Objective: To add integers.
Copy into notes section;
Adding Integers With the Same Sign
Rule 1:
The sum of two positive integers
is a positive integer.
Step 1 – Add the absolute value of the numbers
Step 2 – Keep the sign the same.
Ex: 4 + 3
Step 1 Step 2 Rule 2:
4+3=7
7
The sum of two negative integers
is a negative integer.
Step 1 – Add the absolute value of the numbers
Step 2 – Keep the sign the same.
Ex: -5 + (-6)
Step 1 - 5 + 6 = 11
Step 2 -11
Adding Integers With Different Signs
Rule : To add a positive and a negative integer
follow these steps:
Step 1 Find the absolute value of each integer.
Step 2 Subtract the smaller number from the larger number.
Step 3 The sum (answer) takes the sign of the integer with the larger
absolute value.
Example 1: Find the sum of +7 and -4. (7 + -4)
Step 1: |+7| = 7 and |-4| = 4
Step 2: 7 - 4 = 3
Step 3: The number 3 will take a positive sign since +7 is farther from
zero than -4.
Solution: 7 + - 4 = 3
Example 2: Find the sum of -9 and +5.
Step 1: |-9| = 9 and |+5| = 5
Step 2: 9 - 5 = 4
Step 3: The number 4 will take a negative sign since -9 is farther
from 0 than +5.
Solution: -9 + +5 = -4
Example 3: Find the sum of +6 and -7.
Step 1: |+6| = 6 and |-7| = 7
Step 2: 7 - 6 = 1
Step 3: The number 1 will take a negative sign since -7 is farther
from 0 than +6.
Solution: +6 + -7 = -1
http://www.youtube.com/watch?v=ZYHjT0m_iyQ
SAME SIGNS, KEEP & ADD.
DIFFERENT SIGNS, SUBTRACT.
TAKE THE SIGN OF THE LARGER
NUMBER, THEN YOU’LL BE
EXACT!
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You Try It!
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Turn to pg. 42
With a partner complete #’s 1-19. ODD ONLY
REMEMBER;
 SAME SIGNS, KEEP & ADD.

DIFFERENT SIGNS, SUBTRACT.
 TAKE THE SIGN OF THE LARGER
NUMBER, THEN YOU’LL BE EXACT!
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http://www.xpmath.com/forums/arcade.php?do=play&gameid=45
Adding Integers BINGO
Add 24 integers to your bingo board.
* 12 need to be positive and 12 need to be negative.
* The integers need to range from -20 to 20
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Rules:
All black numbers are +
 Red numbers are –
 First one to get Bingo wins!
Steps:
1)Add the two integers together.
2) If you have the sum on your board cross it
off.
3) First one to cross off 5 in a row wins!
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http://www.studystack.com/flashcard-14253