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?