EXAMPLE 1 Choosing Units of Mass An item has a mass of 10.3 kilograms. Is it a dog or a pencil ? Explain.
EXAMPLE 1 Choosing Units of Mass An item has a mass of 10.3 kilograms. Is it a dog or a pencil ? Explain.
Mar 31, 2015
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EXAMPLE 1 Choosing Units of Mass
An item has a mass of 10.3 kilograms. Is it a dog or a pencil ? Explain.
EXAMPLE 1 Choosing Units of Mass
An item has a mass of 10.3 kilograms. Is it a dog or a pencil ? Explain.
The mass of a book is about 1 kg, so 10.3 kg is the mass of about 10 books.
EXAMPLE 1 Choosing Units of Mass
An item has a mass of 10.3 kilograms. Is it a dog or a pencil ? Explain.
The mass of a book is about 1 kg, so 10.3 kg is the mass of about 10 books.
The mass of a dog is closer to the mass of 10 books, so the item is a dog
EXAMPLE 2
Tell whether the most appropriate unit to measure the capacity of the item is milliliters, liters, or kiloliters.
Choosing Units of Capacity
EXAMPLE 2 Choosing Units of Capacity
Tell whether the most appropriate unit to measure the capacity of the item is milliliters, liters, or kiloliters.
a. bucket b. teaspoon
EXAMPLE 2 Choosing Units of Capacity
Tell whether the most appropriate unit to measure the capacity of the item is milliliters, liters, or kiloliters.
a. bucket b. teaspoon
SOLUTION
a. The capacity of a bucket is closest to the capacity of a large bottle of water. You should use liters.
EXAMPLE 2 Choosing Units of Capacity
Tell whether the most appropriate unit to measure the capacity of the item is milliliters, liters, or kiloliters.
a. bucket b. teaspoon
SOLUTION
a. The capacity of a bucket is closest to the capacity of a large bottle of water. You should use liters.
b. The capacity of a teaspoon is closest to the capacity of an eyedropper.You should use milliliters.
EXAMPLE 3 Choosing Metric Units
Choose an appropriate metric unit to measure the item.
Choosing Metric Units
Choose an appropriate metric unit to measure the item.
a. mass of an eraser
EXAMPLE 3
b. capacity of a bottle of nail polish
Example 3 Adding Whole NumbersChoosing Metric Units
a. The mass of eraser is much greater than one milligramand much less than one kilogram. So, you should usegrams.
EXAMPLE 3
SOLUTION
Example 3 Adding Whole NumbersChoosing Metric Units
a. The mass of eraser is much greater than one milligramand much less than one kilogram. So, you should usegrams.
b. The capacity of a bottle of nail polish is much less thanone liter or one kiloliter. So, you should use milliliters.
EXAMPLE 3
SOLUTION
GUIDED PRACTICE for Examples 1, 2, and 3
1. Mass An animal has a mass of 56 grams. Is it a cat or a mouse? Explain.
GUIDED PRACTICE
1. Mass An animal has a mass of 56 grams. Is it a cat or a mouse? Explain.
mouse; A mouse is small. 56 paper clips would make about the same mass as a mouse.
for Examples 1, 2, and 3
GUIDED PRACTICE
1. Mass An animal has a mass of 56 grams. Is it a cat or a mouse? Explain.
Choose an appropriate metric unit to measure the item.
2. capacity of a wheelbarrow
3. mass of a test tube
4. mass of a car
5. capacity of a thermos
mouse; A mouse is small. 56 paper clips would make about the same mass as a mouse.
for Examples 1, 2, and 3
GUIDED PRACTICE
1. Mass An animal has a mass of 56 grams. Is it a cat or a mouse? Explain.
Choose an appropriate metric unit to measure the item.
2. capacity of a wheelbarrow
3. mass of a test tube
4. mass of a car
5. capacity of a thermos
mouse; A mouse is small. 56 paper clips would make about the same mass as a mouse.
liters
grams
kilograms
liters
for Examples 1, 2, and 3
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