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I DO. 1. Adding and Subtracting Expressions. Example 1 : Simplify the expression using distributive property and by combining like terms. 2 ( x + 3 ) + 4 ( x – 5 ). Are there any hidden 1s or “plus negatives”?. Draw your “rainbows”. 2 ( 1x + 3 ) + 4 ( 1x + -5 ). - PowerPoint PPT Presentation
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Add or Subtract Expressions (XEI402)Name
Nov 30, 2011
1. Adding and Subtracting Expressions
Example 1: Simplify the expression using distributive property and by combining like terms
I DO
2( x + 3 ) + 4( x – 5)
2 * 1x + 2 * 3 + 4 * 1x + 4 * -5
6x + -14
2( 1x + 3 ) + 4( 1x + -5)
Are there any hidden 1s or
“plus negatives”?
2x + 6 + 4x + -20
Draw your “rainbows”
Add or Subtract Expressions (XEI402)Name
Nov 30, 2011
1. Adding and Subtracting Expressions
Example 2: Simplify the expression using distributive property and by combining like terms
WE DO
10 + 4( h + 2)
10 + 4 * 1h + 4 * 2
4h + 18
10 + 4( 1h + 2)
PEMDAS!!!
Distribute the 4 first
Then add 10
10 + 4h + 8
Add or Subtract Expressions (XEI402)Name
Nov 30, 2011
1. Adding and Subtracting Expressions
Example 3: Simplify the expression using distributive property and by combining like terms
WE DO
3( x – 5) – ( x + 3)
3 * 1x + 3 * -5 + -1 * 1x + -1 * 3
2x + -18
3( 1x + -5 ) + -1( 1x + 3)
Are there any hidden 1s or
“plus negatives”?
3x + -15 + -1x + -3
Draw your “rainbows”
Add or Subtract Expressions (XEI402)Name
Nov 30, 2011
1. Adding and Subtracting Expressions
Example 4: Simplify the expression using distributive property and by combining like terms
WE DO
-2( b – 7) – 3( 2b – 4)
-2 * 1b + -2 * -7 + -3 * 2b + -3 * -4
-8n + 26
-2( 1b + -7 ) + -3( 2b + -4)
Are there any hidden 1s or
“plus negatives”?
-2b + 14 + -6b + 12
Draw your “rainbows”
Add or Subtract Expressions (XEI402)Name
Nov 30, 2011
1. Adding and Subtracting Expressions
Example 5: Simplify the expression using distributive property and by combining like terms
YOU DO
-2 + 5( 6c – 8)
-2 + 5 * 6c + 5 * -8
30c + -42
-2 + 5( 6c + -8)
Are there any hidden 1s or
“plus negatives”?
-2 + 30c + -40
PEMDAS!!!
Distribute the 5 first
Then add -2
Add or Subtract Expressions (XEI402)Name
Nov 30, 2011
1. Adding and Subtracting Expressions
Example 6: Simplify the expression using distributive property and by combining like terms
YOU DO
-4( 2j – 5) + 2( -4 + 3j)
-4 * 2j + -4 * -5 + 2 * -4 + 2 * 3j
-2j + 12
-4( 2j + -5 ) + 2( -4 + 3j)
Are there any hidden 1s or
“plus negatives”?
-8j + 20 + -8 + 6j
Draw your “rainbows”
