Estimate using large paper clips.

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Presentation transcript:

Estimate using large paper clips. EXAMPLE 1 Using Metric Units of Length Estimate the length of the bandage by imagining large paper clips laid next to it. Then measure the bandage with a metric ruler to check your estimate. STEP 1 Estimate using large paper clips. About 5 large paper clips fits next to the bandage, so it is about 5 centimeters long.

EXAMPLE 1 Using Metric Units of Length Estimate the length of the bandage by imagining large paper clips laid next to it. Then measure the bandage with a metric ruler to check your estimate. STEP 2 Measure using a ruler. Each centimeter is divided into tenths, the bandage is 4.8 centimeters long.

Find the mass of the apples. EXAMPLE 2 Measuring Mass Find the mass of the apples.

You can use the following benchmarks to estimate mass. EXAMPLE 2 Measuring Mass Mass Benchmarks You can use the following benchmarks to estimate mass. 1 milligram grain of sugar 1 gram small paper clip 1 kilogram textbook

Copy and complete using the appropriate metric unit: EXAMPLE 3 Using Metric Units of Mass Copy and complete using the appropriate metric unit: The mass of a CD is 16 ? . The mass of a CD is greater than the mass of 16 grains of sugar (16 mg), and it is less than the mass of 16 textbooks (16 kg). Because a good estimate for the mass of a CD is 16 paper clips, the appropriate metric unit is grams. ANSWER The mass of a CD is 16 grams.

between 0 kg and 1 kg ( at about 0.75 kg ) GUIDED PRACTICE for Examples 1, 2 and 3 1. What If? Suppose you estimate with paper clips that a larger bandage is about 8 centimeters long. Is its actual length more likely to be 7.2 centimeters or 7.7 centimeters? ANSWER 7.7 cm 2. What If? Suppose there were only 3 apples on the scale in Example 2. Describe where the pointer would point relative to the 1 kg mark. ANSWER between 0 kg and 1 kg ( at about 0.75 kg )

Copy and complete using the appropriate metric unit. GUIDED PRACTICE for Examples 1, 2 and 3 Copy and complete using the appropriate metric unit. 3. The mass of a baby is 4 ? . ANSWER kg 4. The mass of a tack is 200 ? . ANSWER mg