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

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

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

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

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

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

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

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

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 = 0.008 kilometers

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

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