Systems of Measurement Lesson 4

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Presentation transcript:

Systems of Measurement Lesson 4

Warm-up: 20 yards = ______ feet 40 inches = _____ feet ____ inches 6 yards = _____ inches 5679 mm = ______ m 4.5 km = _____ cm 124.5 cm = ______ m

Answers to Friday's Homework 2 km 9000m 9L 3000g 24in 48 in 26 in 53 in 37 in 63 in 1 ft 5 in

So far... SI system -> SI system Imperial -> Imperial

Today... Conversions Between Different Systems (Imperial -> SI, SI -> Imperial)

Why are conversions important? Watch this!! http://www.cbc.ca/archives/categories/science-technology/measurement/for-good-measure- canada-converts-to-metric/gimli-glider-lands-without-fuel.html

Investigate:Using your ruler, fill in the closest approximate conversions: o 1mm = ____ in o 1 cm = ____ in o 1 in = ____ mm o 1 in = ____ cm

*Glue in your notebook

Your conversion chart can be used for the unit - do not mark on it. Examples: 90 ft into m 80 km into mi 32 yd into cm

Independent Practice: Conversion Worksheet (due Tuesday) *Conversion Quiz Wednesday!

Word Problem Application 1

Word Problem Application 2

Example 1 Maxime is a finishing carpenter who is replacing the case  moulding around a double French door and the baseboards  around the 4 walls of a living room. The dimensions of the  rectangular living room are 20′ × 15'. The French door is along  one of the 20′ walls, and the door frame measures 72" wide and 84" high. Case moulding costs $9.50 a linear foot and baseboard costs  $4.50 a linear foot. These items must be purchased in whole  feet. If Maxime’s labour charge is $8.50 a linear foot, what will be  the total cost of this job?

Example 2 Kiri needs to replace the wooden fence that surrounds her  yard. She measured her property, and it is 18 yards wide and  12 yards deep. There is no fence in front of her house, and the  gap in the fence at the front of the property is 42 feet, as  shown in the diagram. Kiri plans to replace the existing fence pickets with 5-foot-long cedar boards placed vertically. The boards are 5 1/2 inches wide and will be spaced 1/4 inch apart. She placed an order for 275 boards. Did she order enough boards?