The document contains notes from a math lesson on November 13th that includes: 1) An assignment due the next day and a warm-up with word problems 2) Definitions of additive inverse, algebraic term, numerical coefficient, and like terms 3) A note on how to add integers by adding when signs are the same and subtracting when they are different 4) Examples of simplifying integer expressions and collecting like terms

1. Lesson 31.notebook November 13, 2012
Assignment:
1­­>Set 32 (evens) ­ Due Tomorrow (11/14)
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2. Lesson 31.notebook November 13, 2012
Lesson 31 Warm­Up:
1) 17 people have $200 each. How much
money do they have in all?
2) What is 75% of $200?
3) Find the perimeter: 10 in.
8 in.
4) Find the area:
5) Name the property illustrated: 62 x 0 = 0
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3. Lesson 31.notebook November 13, 2012
Lesson 31
*additive inverse – the opposite of a number
*algebraic term – an expression that includes a positive or
negative number and may include one or more variables
*numerical coefficient – the number part of a term
*like terms – terms that have identical variable parts,
including exponents
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4. Lesson 31.notebook November 13, 2012
FYI...
*To add integers:
when the signs are the same: ADD & use the same sign
when the signs are different: SUBTRACT & use the sign of
the larger number
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5. Lesson 31.notebook November 13, 2012
Examples ­ Lesson 31
Simplify.
A) (­12) + (­3)
B) (­12) + (3)
C) (12) + (­3)
D) (­3) + (+12)
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6. Lesson 31.notebook November 13, 2012
Collect like terms.
E) 3x + 2xy + xy ­ x
F) 6x2 ­ x + 2x ­ 1
G) 2a3 + 3b ­ a3 ­ 4b
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7. Lesson 31.notebook November 13, 2012
H) x + y ­ 1 ­ x + y + 1
I) P = L + W + L + W
J) P = s + s + s + s
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