Problem Taylor Carissa and Paige are splitting a

Problem Taylor, Carissa, and Paige are splitting a pizza. They order from Pizza Hut a large pepperoni and a Coke for $16, and they tip $3 total. On their calculator, they type in 16 + 3 ÷ 3 in order to figure out how much they each owe. How much do each of them owe? Discuss

1. 3 Order Of Operations The reason why math is an international language Objectives: 1. ) KNOW the order to solve a math expression

PEMDAS • Way to remember P. E. M. D. A. S. • P lease (Parentheses) • E xcuse (Exponents) • M y (Multiplication) • D ear (Division) • A unt (Addition) • S ally (Subtraction) Pandas Eat Many Delicious Apples Smiling

P E M DA S misconception • Addition and subtraction have same authority • Multiplication and Division have same authority • Example : 3 – 2 + 1 Step 2 • Example: 5 ÷ 5 × 4 Step 1 Step 2

WHAT TO DO WITH PARENTHESES • Different forms of parenthesis [] or () • Parentheses in parenthesis- work from inner to outer • (4 + (42 – 5)) • Do PEMDAS within the parenthesis

FRACTION BAR • If you have a fraction bar, that is division. Use PARENTHESES to group what is on top and what is on bottom. • Example

52 + 12 · 4 Step 1 Step 2

Ex. 31. ) 2 [(7 -4) + 3]+15

Take a look at 43

• Ch. 1. 3 pg. 19 -20 #s 1 -9(od); 12; 29 -31(step-by-step); 38 -39; 4244; 48 -49

1. 3 Answer key Ch. 1. 3 pg. 19 -20 #s 1 -9(od); 12; 29 -31; 38 -39; 42 - 44; 48 -49 1. ) The order of operations starts with parenthesis, exponents, then multiplication OR division (whichever comes first from left to right), then addition OR subtraction (again, whichever comes first from left to right) 3. ) Whichever appears on the left side will come first. 5. ) 5 6(5) 31. ) In notes = 30(5) mult = 150 mult 38. ) 1. 5 7. ) 16/4 – 2 = 4 – 2 div 39. ) In notes =2 sub 43. ) In your notes 3 9. ) 16/4 +2 – 10 = 16/4 + 8 – 10 exp 44. ) Calculator A; 15 – (9÷ 3) +7 = 4 + 8 – 10 div = 12 – 10 add = 22 subt 48. ) 35( 230 + 300+ 50 +25+ 100 + 200) - 3200 12. ) Place parantheses around 72 and 12 29. ) 10 ÷ (3+2) + 9 = 10 ÷ 5 + 9 =2 +9 = 11 par div addition 30. ) 7[(18 – 6) + 6 = 7[(12) +6] Inner Par/sub = 7[18] Par/ add = 126 Mult 49. ) 28, 475