1. Ratios, Rates and Percents
Lesson 4
Ratios, Rates and Percents
Metric Conversions

2. Warm-Up Complete each conversion.
Roger has 6 green olives and 4 black olives.
Write the ratio of Roger’s green olives to his black olives.
Write the ratio of Roger’s green olives to his total number of olives.
Complete each conversion.
18 inches = _____ feet
2 tons = _____ pounds

3. Target: Convert metric measurements.
Metric Conversions
Target:
Convert metric measurements.

4. Example 1
Choose a reasonable estimate. Explain your choice. a. weight of paperclip: 1 gram or 1 kilogram b. length of van: 4 kilometers or 4 meters c. water in a personal water bottle: 1 milliliter or 1 liter

5. Example 2a Complete the conversion: 2 kilometers = __ meters
Conversion: 1 kilometer = 1000 meters
Multiply: 2 × 1000 = 2000
2 kilometers = 2,000 meters

6. Example 2b Complete the conversion: 3.9 kilograms = __ grams
Conversion: 1 kilogram = 1000 grams
Multiply: × = 3900
3.9 kilograms = 3,900 grams

7. Example 2c Complete the conversion: 4000 meters = __ kilometers
Conversion: 1 kilometer = 1000 meters
Divide: ÷ 1000 = 4
4000 meters = 4 kilometers

8. Example 2d Complete the conversion: 650 centimeters = __ meters
Conversion: 1 meter = 100 centimeters
Divide: ÷ 100 = 6.5
650 centimeters = 6.5 meters

9. Example 3 Convert 8 meters to millimeters, centimeters and kilometers.
1000 millimeters = 1 meter multiply: 8 ×1000 = 8000 millimeters
100 centimeters = 1 meter multiply: 8 ×100 = 800 centimeters
1000 meters = 1 kilometer divide: 8 ÷ 1000 = kilometers

10. Exit Problems Complete each conversion. 8 meters = _____ centimeters
600 meters = _____ kilometers
19 kilograms = _____ grams

11. Communication Prompt
How does the prefix on a metric unit help you determine the size of the metric unit?