Review of Chapter 1 Test on Friday 20 questions, 10 multiple choice.

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Presentation transcript:

Review of Chapter 1 Test on Friday 20 questions, 10 multiple choice

Order of Operations: PEMDAS When evaluating expressions, it is very important that you perform the operations in the correct order: P: parentheses E: exponents MD: multiplication and division from left to right AS: addition and subtraction from left to right

Examples of Order of Operations 1) 2)

Adding/Subtracting Integers = 86 – 2 = (-2) = 46 – (-2) = = -4-6 – 2 = (-2) = -8-6 – (-2) = -4

Multiplying and Dividing Integers Same sign (both positive or both negative) = positive. Different signs (one positive/one negative) = negative.

Adding/Subtracting Fractions Must have the same denominator!

Multiplying and Dividing Fractions Multiply Across and Reduce OR Cross Cancel Division: Multiply by the reciprocal

Matrices Subtract each corresponding entry. Beware of Integer Rules. Subtracting a Negative is like adding.

Types of Numbers Whole numbers are positive. Integers are positive and negative whole numbers. Rational numbers are numbers that can be written as a fraction.

Properties Commutative: a + b = b + a, ab = ba Associative: (a + b) + c = a + (b + c), (ab)c = a(bc) Identity: a + 0 = a, b(1) = b

11 Extra Practice pg 54 (3-15 odds, 20) pg 55 (2-9 all)