Problem of the Day 4 ( 3 + 2 ) - 1 = 19 1 2 3 4 + - ( ) 1 2 3 4 + - ( ) Put the above items in order so that the answer is 19. 4 ( 3 + 2 ) - 1 = 19

Chapter 1: Decimals & Integers 1-9: Order of operations and the Distributive property Grade 6 Mathematics

Why follow the order of operations? Without an order of operation, an expression might have different values. This helps us to accept the universal interpretation, otherwise there would be chaos.

Order of Operations P (Parentheses) E (Exponents) M or D A or S Multiply or Divide from left to right Add or subtract from left to right Remember: Please Explain My Answer

Rules to multiply / divide Multiplying /Dividing Integers Same sign? Different sign? The answer is negative The answer is positive

What is the distributive property? We use this property when we have to evaluate expressions that have a number multiplying a sum or a difference. For example: 3(5+9) You distribute the factor at the beginning of the expression into each term inside the parentheses. Or: 9(11.1)

Practice problem You want to buy 3 cans of soup at $0.89 each and 2 boxes of crackers at $1.59 each. What is the total cost? 3 (0.89) + 2 (1.59) Because of PEMA, you must multiply before adding. Answer: $5.85

Homework for Friday, 9/14 Lesson 1-9: p. 50 – 51 # 2 – 34 evens (Show your work and write neatly!) Quiz on Wednesday (1-6 through 1-9)