Announcements 3/17 Homework New late policy for 6th grade: Replacing Letters with Numbers Practice Study for quiz over Lesson 7 Weekly Math #20 – due by next Friday completed – corrections will be due by the following Friday New late policy for 6th grade: -1 day late = -10 -after 1 day late = 50% New AE schedule starts this week Iready Wednesday and Thursday MAP testing (Math) on Thursday = altered schedule

Stretch Break and new seats

Review Homework Distributive Property #1-15

Replacing Numbers with Letters - Discussion 4 + 0 = 4 4 · 1 = 4 4 ÷ 1 = 4 4 · 0 = 0 1 ÷ 4 = 1 4 How many of these statements are true? How many of those statements would be true if the number 4 was replaced with the number 7 in each of the number sentences? Is there a number to replace 4 that would make any of the number sentences untrue? Division by zero is undefined

Discussion What if we replace the number 4 with a letter g? Write all 5 expressions into your notes, replacing each 4 with a g. Are these all true (g = all real numbers, except for g=0) when evaluating? Review Properties

Properties Quiz Write Letters in all CAPS to the LEFT of the corresponding number Ex: B – 1 When finished turn quiz into me and pick up warm up slip

Warm Up For exercise, Cindy swims every 6 days and jogs every 8 days. She did both today. How many days from now until she swims and jogs again? The elevation of an object tells you its distance above or below sea level. The table below shows the elevations of 4 objects. Graph their locations on a number line. Object Mountain Fish Sunken Ship Airplane Elevation (km) 9 -1 -5 4

Review Square means? Rectangle means? Length and width? Perimeter? Area? Volume? 3 · 3 = Units · Units = Perimeter of shapes = add all the measurements of the borders of a given shape Area of Square = s² Area of Rectangle = l · w Volume = l · w · h/d

Lesson 7 Replacing Letters with Numbers - Discussion What is the length of one side of this square? What is the formula for the area of a square? What is the square’s area as a multiplication expression? What is the square’s area?

Discussion What is the side length of this square? What expression can we build to find this square’s area? What is the area of this square?

Discussion A letter represents one number in an expression What did s represent in the first problem? The second? When that number replaces the letter, the value of the expression is one number What was the value of the expression in the first problem?

Practice Complete Exercise 1 and glue/staple/tape into notebook Label squares A and B

Discussion What does the letter b represent in this blue rectangle? With a partner, answer the following question: Given that the second rectangle is divided into 4 equal parts, what number does the x represent? How did you all arrive at this answer? What is the total length of the 2nd rectangle? If the 2 large rectangles have equal lengths and widths, find the area of each rectangle.

Practice Complete Exercise 2 and glue/staple/tape into notebook

Discussion Give the name of the shape seen here What does the l represent in the diagram? What does the w represent in the diagram? What does the h represent in the diagram?

Discussion Since we know the formula to find the volume is V = l · w · h, what number can we substitute for the l in the formula? w? h? Determine the volume of the rectangular prism by replacing the letters in the formula with their appropriate numbers.

Practice Complete Exercise 3 and glue/staple/tape into notebook

Closing Discussion

Homework 4. Give the name of the shape. Give the length and width, the perimeter, and the area of the shape.