AGENDA• WARM-UP• LESSON 6 CORRECTIONS• LESSON 7 HW QUESTIONS??• LESSON 8• EXIT CARD

WARM-UP

Simplify. 1. - (2)3

    2. [4 · (19 – 14)2] ÷ 20

LESSON 7 HW QUESTIONS??

LESSON 8: USING UNIT ANALYSIS TO CONVERT MEASURES

Unit Analysis : a process for converting measures.

Ex: An elephant can charge at speeds of about 25 miles per hour. How fast can an elephant charge in feet per hour?

IN GENERAL..

a) Larger units Smaller units : MULTIPLY

b) Smaller units Larger units : DIVIDE

Draw a 1 ft x 1 ft square and label it square A.

Draw a 12 in x 12 in square and label it square B.

1. What are the areas of squares A and B?

2. Why is it necessary to multiply the unit ratio twice to convert square feet to square inches?

NOW EXTEND TO 3-DIMENSIONS

Draw a cube with dimensions of 1 yard and one with dimensions 3 feet.

Use a unit ratio to convert the volume of the first cube into cubic fee.

Suppose that a gallon of paint will cover 57,600 . Sam wants to paint the wall of her hallway with two coats. The wall is 36 ft long and 10.5 ft tall. Will 2 gal of the paint be enough to cover the wall? Explain.

A can of spray-paint can spray 1000 cubic centimeters of paint per minute. How long would it take to empty a container that is 0.2 ?

• Lesson 8

• Pp. 40 - 41: #1 – 17 All

• CP: #22

• Due Friday