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5 Minute Check Complete in your notebook x x 5 12

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5 Minute Check Complete in your notebook x 3 6

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5 Minute Check Complete in your notebook x x 6 = 30 =10 30 =10 15

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5 Minute Check Complete in your notebook x 5 12

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5 Minute Check Complete in your notebook x x 12 = 60 =19 60 =19 2

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Friday, Oct 25 Lesson 4.5 Convert Measurement Units

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Objective: To understand how to change units of measurement in the customary system

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Convert Measurement Units At the end of this lesson you should be able to answer the following question. How do you use ratios to convert units of measurement?

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Convert Measurement Units A relationship within the same type of unit of measurement can be written as a ratio. Example 1 yard = 3 feet can be written as 1 yard 3 feet

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Convert Measurement Units These ratios can be used to set up a proportion to solve measurement problems. Example 1 yard 6 yards 3 feet = ? feet

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Convert Measurement Units If you do not know these relationships, use the chart on page 290. This must be memorized by Monday for the quiz.

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Convert Measurement Units Convert 20 feet to inches. Step 1 – Identify the direct relationship between the units in the problem. 1 foot 12 inches 12 inches or 1 foot

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Convert Measurement Units Convert 20 feet to inches. Step 2 – Create a ratio from the numbers in the original problem. 20 feet ? inches ? inches or 20 feet

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Convert Measurement Units Convert 20 feet to inches. Step 3 – Create a proportion with the two ratios, making sure the same units are in the numerator on each ratio. 20 feet 1 foot ? inches = 12 inches

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Convert Measurement Units Convert 20 feet to inches. Step 4 – Multiply the diagonal numbers, then divide by the remaining number. Then add the correct unit. 20 feet 1 foot ? inches = 12 inches 20 x 12 = 240

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Convert Measurement Units Convert 20 feet to inches. Step 4 – Multiply the diagonal numbers, then divide by the remaining number. Then add the correct unit. 20 feet 1 foot ? inches = 12 inches 20 x 12 = 240 ÷ 1 = 240 inches

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Convert Measurement Units 36 yards = ? feet Step 1 ?

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Convert Measurement Units 36 yards = ? feet Step 1 ? 1 yard 3 feet Step 2 ?

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Convert Measurement Units 36 yards = ? feet Step 2 ? 1 yard 36 yards 3 feet ? feet Step 3 ?

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Convert Measurement Units 36 yards = ? feet Step 3 ? 1 yard 36 yards 3 feet = ? feet Step 4 ?

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Convert Measurement Units 36 yards = ? feet Step 4 ? 1 yard 36 yards 3 feet = ? feet 3 x 36 = 108 ÷ 1 = 108 feet

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Convert Measurement Units ¾ ton = ? pounds Do this on your own.

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Convert Measurement Units ¾ ton = ? pounds 1 ton ¾ ton 2000 pounds = ? pounds x 4 = 4 = 1500 ÷1 = 1500 pounds

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Convert Measurement Units Marco mixes ¼ cup of fertilizer with soil before planting each bulb. How many fluid ounces of fertilizer does he use for each bulb? Do this on your own.

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Convert Measurement Units Marco mixes ¼ cup of fertilizer with soil before planting each bulb. How many fluid ounces of fertilizer does he use for each bulb? 1 cup ¼ cup 8 ounces = ? ounces x 4 = 4 =2 ÷1 = 2 ounces

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Convert Measurement Units Convert 15 quarts to gallons. Do this on your own.

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Convert Measurement Units Convert 15 quarts to gallons. 4 quart 15 quarts 1 gallon = ? Gallon x 15 = 15 ÷ 4 = 4 )

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Convert Measurement Units 100 ounces = ? pounds. Do this on your own.

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Convert Measurement Units 100 ounces = ? pounds. 16 ounces 100 ounces 1 pound = ? Pound = x 100 = 100 ÷ 16 =16 )

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Convert Measurement Units Manual and his friends spent his birthday at the game center. He spent 4/7 of his money on go karts and now has $15 left. How much money did he spend on go karts? We can draw a bar diagram to solve this problem. Step 1 – Create a bar diagram and divide into sections matching the denominator of the fraction.

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Convert Measurement Units Manual and his friends spent his birthday at the game center. He spent 4/7 of his money on go karts and now has $15 left. How much money did he spend on go karts? Step 2 – Divide the bar diagram by the numerator in the fraction. Amount spent on Amount not spent go karts on go karts ($15)

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Convert Measurement Units Manual and his friends spent his birthday at the game center. He spent 4/7 of his money on go karts and now has $15 left. How much money did he spend on go karts? Step 3 – Determine how much each section is worth. Amount spent on Amount not spent go karts on go karts ($15)

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Convert Measurement Units Manual and his friends spent his birthday at the game center. He spent 4/7 of his money on go karts and now has $15 left. How much money did he spend on go karts? Step 4 – Determine the unknown amount. Refer to page 297 for additional information on “Draw a Diagram” instructions. Amount spent on Amount not spent go karts on go karts ($15)

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Convert Measurement Units How do you use ratios to convert units of measurement?

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Convert Measurement Units. Complete the Mid-Chapter Check on page 300. If you do not complete today, please complete by Monday. Agenda Notes Homework – No Homework Mid Chapter 4 Quiz –Monday, Oct 28

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