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Lesson 1.4 – Word Problems. What is an inverse operation? What does GEMDAS stand for? Why do we use GEMDAS instead of PEMDAS? What is the inverse operation.

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Presentation on theme: "Lesson 1.4 – Word Problems. What is an inverse operation? What does GEMDAS stand for? Why do we use GEMDAS instead of PEMDAS? What is the inverse operation."— Presentation transcript:

1 Lesson 1.4 – Word Problems

2 What is an inverse operation? What does GEMDAS stand for? Why do we use GEMDAS instead of PEMDAS? What is the inverse operation of addition? Subtraction? Multiplication? Division? Squaring? Taking the square root? What is set notation? What does the intersection of a set mean? What does the union of a set mean? What does the empty set mean? What is the policy regarding late homework? Cubing? Taking the 10 th root? Moving one decimal place to the right? What is symbol for the union of sets? What is symbol for the intersection of sets? X = {1, 2, 3, 4} Y = (3, 4, 5, 6}

3 1. Read the entire problem without making any annotations. 2. Re-read the problem: -First underline and annotate what the question is asking -Then underline and annotate other important information SymbolMeaning ?What the question is asking Numbers and their units =  + - x   Operations and relationships x independent variable y dependent variable

4 Before the market opens on Monday, a stock is priced at $25. If its price decreases $4 on Monday, increases $6 on Tuesday, and then decreases $2 on Wednesday, what is the final price of the stock on Wednesday?

5 John can shovel a certain driveway in 50 minutes. If Mary can shovel the same driveway in 20 minutes, how long will it take them, to the nearest minute, to shovel the driveway if they work together?

6 A student has a debit card with a prepaid amount of $270 to use for school lunches. The cafeteria charges $4.50 per lunch. Write an expression for the balance on the card after buying x lunches. Does your expression make sense for all positive integer values of x? Explain


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