Unit Factor Method for Solving Problems

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Presentation transcript:

Unit Factor Method for Solving Problems 3 = 1 1 3 = x 3 = 1

Units Factor, too! m = 1 1 m = x m = 1

3m = 1 1 3m = x 3m = 1

1 3m = x 3m 1 = 1

What is the problem asking? How many grams are in 4 milligrams? Conversion Factor 4mg = 1000mg 1g 0.004g ? g quantity given by the problem What is the problem asking?

How many hours are there in three days? = ? hr 3d 1d 24hr = 72 ? hr

How many days are there in three hours? = ? d 3hr 24hr 1d = 3d 24 = 0.125 d ? d

8 slices pizza = 12 people ? pizzas 2 slices person 3 You’ve decided to have a party for 12 of your friends. You order pizza that has 8 slices per pizza. How many pizzas do you need if each person has 2 slices? 8 slices pizza = 12 people ? pizzas 2 slices person 3

= 3x108 m s ? m/d 60 s min 60 min hr d 24 hr 2.6x1013 m/d The speed of light is about 300,000,000 meters per second, written in scientific notation as 3.0x108 m/s. How many meters does light travel in one day? = 3x108 m s ? m/d 60 s min 60 min hr d 24 hr 2.6x1013 m/d

Given Unit Desired Unit = Given Unit Desired Unit

3x108 m 1,000 m 1 km 1.6093 km 1 mi = s 1.86x105 mi s = 60 s 1 min How fast does light travel in miles/hour? Now it’s your turn to try! 3x108 m 1,000 m 1 km 1.6093 km 1 mi = s 1.86x105 mi s = 60 s 1 min 60 min 1 hr 6.7x108 ? mi/hr 1 mi = 1.6093 km