# 1-5 Measuring in Metric Units - Mrs. Kemp's Class 1-5 Measuring in Metric Units Youll Learn: To use and convert metric units of measure. Metric Units Type Unit Reference Example Length Millimeter (mm) Centimeter (cm) Meter (m) Kilometer (km) About About About floor About the thickness of a dime

the width of your little finger the distance from a doorknob to the the length of 11 football fields Capacity Milliliter (mL) Liter (L) A small spoon holds about 5 mL A little more than 1 quart Mass About the mass of a mosquito About the mass of a paper clip About the mass of a bunch of bananas Milligram (mg) Gram (g) Kilogram (kg) Metric Length Relationships Unit Kilometer Hecto- Decameter meter

meter Decimeter Centimeter Millimeter Symbo km l hm dam m dm cm mm Value 100m

10m 1m 0.1m 0.01m 0.001 m 1,000m Choosing a Reasonable Estimate When trying to measure using the metric system, it is important to estimate so that you can accurately choose a tool to measure. Choose a reasonable estimate: Height of a classroom 3 cm

3m 3 km Mass of a bag of flour 2.3 mg 2.3 g 2.3 kg Choose a reasonable estimate and explain your choice. Capacity/Volume of a soup bowl: 180 mL 180 kL Mass of a Butterfly: 500 mg

180 L 500 g 500 kg Height of an oak tree: 22 cm 22 m 22 km Multiplying to Change Units You can change a measurement from one unit to another by finding the relationship between the two units and multiplying. Metric Relationships Unit Kilometer

Hecto- Decameter meter meter Decimeter Centimeter Millimeter Symbo km l hm dam m dm cm mm Value

100m 10m 1m 0.1m 0.01m 0.001 m 1,000m Milliliter Unit Symbo L l mL Value 0.001 L

Unit liter 1L Kilogram gram Milligram Symbo kg l g mg Value 1g 0.001 g 1,000g

Step 1 Decide if the conversion you are trying to do is going from a larger unit to a smaller unit or from a small unit to a larger unit. mL to L km to m cm to m Step 2 Decide how many of the missing unit fits into the known unit. 245 mL = _____ L 1 mL = 0.001 L Hint: If you are going from big to small, your missing unit value should be a WHOLE number. If you are going from small to big, your missing unit value should be a DECIMAL. mL is smaller than L Small to Big We use a decimal.

Step 3 Once you decide your relationship, multiply by the missing value. 245 x 0.001 = 0.245 L Put it all together! Change 245 milliliters to liters. 245 mL = ____L o 1 mL = 0.001 L o 245 x 0.001 = 0.245 o Check for Reasonableness: o A milliliter is less than a liter. So, the number of liters should be less than the number of milliliters. 0.245 < 245, so the answer is reasonable.