Chapter 1 Section 3 Write Expressions Objective: Students will translate verbal phrases into expressions Standard: A.SSE.1 & A.SSE.2

Write Expressions SymbolMeaningExample Addition Sum, plus, total, more than, increased by Subtraction Difference, less than, minus, decreased by Multiplication Times, products, multiplied by, of Division Quotient, divided by, divided into The sum of 2 and a number x x + 2 The difference of a number n and 6 n - 6 ¼ of a number x ¼ x The quotient of a number k and 2

NOTE: Order is important when writing SUBTRACTION AND DIVISION!!

Translate into an expression 1. The sum of 6 and a number y 2. Seven less than twice a number z + 6 y <- NOT Correct! “less than” means switch! y z OR 2z - 7

Write an expression for the situation 3. Number of minutes in s seconds 4. Number of candies from a 12 pack left to eat if you’ve eaten z candies We know 60 seconds in one minute so: - 12 z

Rates n4n4 Rate: fraction that compares two quantities measured in different units Unit Rate: Example: miles per hour, Calories per serving.

Unit rates 5. Find the unit rate: Word Problems: 6. Jenny earns $50 a day working part time at a supermarket. Write an algebraic expression to represent the amount of money she will earn in d days. How much money will she have made after 5 days of working? 60 miles per hour a. 50 * d or 50d Think: Would I use +, -, * or ÷ b. In 5 days: 50d = 50(5) = $250

1.3 HW pg – 26 all,