Transcript Interactive Chalkboard - Tuslaw Local School District

Example 1 Change Larger Units to Smaller Units
Example 2 Change Smaller Units to Larger Units
Example 3 Draw a Line Segment
Example 4 Measure Length
Complete 7 ft
Since 1 foot
? in.
12 inches, multiply by 12.
Answer: So, 7 feet
84 inches.
Complete 5 ft
Answer: 60
? in.
Complete 27 ft
Since 3 feet
? yd.
1 yard, divide by 3.
Answer: So, 27 feet
9 yards.
Complete 33 ft
Answer: 11
? yd.
Draw a line segment measuring
Draw a line segment from 0 to
Answer:
Draw a line segment measuring
Answer:
RUBBER BANDS Measure the length of the rubber
band to the nearest half, fourth, or eighth inch.
The rubber band is between
It is closer to
inches.
inches.
Answer: The length of the rubber band is about
CRAYONS Measure the length of the crayon to the
nearest half, fourth, or eighth inch.
Answer:
Example 1 Change Units of Capacity
Example 2 Change Units of Capacity
Example 3 Change Units of Weight
Example 4 Change Units of Weight
Complete 5 qt
THINK
1 quart
? pt.
2 pints
Multiply to change a larger unit to a smaller unit.
Answer: So, 5 quarts 10 pints.
Complete 3 qt
Answer: 6
? pt.
Complete 80 fl oz
? pt.
THINK 8 fluid ounces 1 cup and 2 cups
You need to divide twice.
1 pint.
Divide to change fluid ounces to cups.
Divide to change cups to pints.
Answer: So, 80 fluid ounces
5 pints.
Complete 96 fl oz
Answer: 6
? pt.
ELEPHANTS An adult male elephant weighs 11,000
pounds. How many tons is this?
11,000 lb
? T
THINK
2,000 pounds
1 ton
Divide to change pounds to tons.
Answer:
BOULDER A boulder in a national park is estimated to
weigh 4,000 pounds. How many tons is this?
Answer: 2
BANQUETS How many people at a banquet can be
served 4 ounces of carrots from 8 pounds of carrots?
First, find the total number of ounces in 8 pounds.
Multiply by 16 to change pounds to ounces.
Next, find how many sets of 4 ounces are in 128 ounces.
Answer: So, 32 people can be served 4 ounces of carrots.
CHOCOLATE How many 4-ounce bags of
chocolate candy can be made with 7 pounds
of chocolate candy?
Answer: 28 bags
Example 1 Use Metric Units of Length
Example 2 Use Metric Units of Length
Example 3 Use Metric Units of Length
Example 4 Use Metric Units of Length
Example 5 Estimate Length in Metric Units
Write the metric unit of length you would use to
measure the width of a classroom.
The width of a classroom is larger than the width of
a doorway, but much smaller than the length of six
city blocks.
Answer: So, the meter is an appropriate unit of measure.
Write the metric unit of length you would use to
measure the length of a toothpick.
Answer: centimeter
Write the metric unit of length you would use
to measure the height of a drinking fountain.
The height of a drinking fountain is close to the width of
a doorway.
Answer: So, the meter is an appropriate unit of measure.
Write the metric unit of length you would use to
measure the distance from your home to your school.
Answer: kilometer
Write the metric unit of length you would use to
measure the distance from the East Coast to the
West Coast.
The distance from the East Coast to the West Coast is
much larger than six city blocks.
Answer: So, the kilometer is an appropriate unit
of measure.
Write the metric unit of length you would use
to measure the length of a flashlight.
Answer: centimeter
Write the metric unit of length you would use
to measure the width of a wide-tip marker.
The width of a wide-tip marker is close to half the width
of a penny.
Answer: So, the centimeter is an appropriate unit
of measure.
Write the metric unit of length you would use
to measure the length of a minivan.
Answer: meter
MULTIPLE-CHOICE TEST ITEM Which is the best
estimate for the measurement of the line
segment?
A 5.0 mm
B 5.0 cm
C 7.0 cm
D 1.0 m
Read the Test Item
You need to determine the best estimate for the measure
of the segment.
Solve the Test Item
The segment is much smaller than 1.0 meter, or the
width of a doorway, so choice D can be eliminated.
Seven centimeters is about the width of 3 and a half
pennies and 5 centimeters is about the width of 2 and a
half pennies. The segment is smaller than the width of
one penny so Choices B and C can be eliminated. So,
the best estimate for the line segment is 5.0 millimeters.
Answer: A
MULTIPLE-CHOICE TEST ITEM Which is the best
estimate for the measurement of the line segment?
A 0.5 m
Answer: D
B 9 cm
C 1.5 mm
D 2.5 cm
Example 1 Use Metric Units of Mass
Example 2 Use Metric Units of Mass
Example 3 Use Metric Units of Capacity
Example 4 Use Metric Units of Capacity
Example 5 Comparing Metric Units
Write the metric unit of mass that you would use to
measure a push pin. Then estimate the mass.
A push pin has a mass greater than one small paper clip,
but less than six apples.
Estimate
A push pin is a little heavier than a paper clip.
Answer: So, the gram is the appropriate unit.
One estimate for the mass of a push pin
is 2 grams.
Write the metric unit of mass that you would use
to measure a pencil. Then estimate the mass.
Sample answer: gram, 10 g
Write the metric unit of mass that you would use to
measure a medium-sized dog. Then estimate the mass.
A medium-sized dog has a mass greater than
six medium apples.
Answer: So, the kilogram is the appropriate unit.
One estimate for the mass of a medium-sized
dog is 10 kg.
Write the metric unit of mass that you would use
to measure a bicycle. Then estimate the mass.
Sample answer: kilogram, 20 kg
Write the metric unit of capacity that you would use to
measure the fruit juice in a punch bowl. Then estimate
the capacity.
A punch bowl has a capacity about the same
as a small pitcher.
Answer: So, the liter is the appropriate unit. One
estimate for the fruit juice in a punch bowl
is 1 liter.
Write the metric unit of capacity that you would use
to measure the amount of juice in a small cup. Then
estimate the capacity.
Sample answer: milliliter, 200 mL
Write the metric unit of capacity that you would use
to measure the juice in one raspberry. Then estimate
the capacity.
The juice in one raspberry is greater than an eyedropper
and less than a small pitcher.
Answer: So, the milliliter is the appropriate unit.
One estimate for the juice in one raspberry
is 2 milliliters.
Write the metric unit of capacity that you would use
to measure the milk in a large pitcher of milk. Then
estimate the capacity.
Sample answer: liter, 2 L
Example 1 Change Metric Units
Example 2 Change Metric Units
Example 3 Change Units to Solve a Problem
Complete 147 g
? kg.
Since 1,000 grams 1 kilogram, divide by 1,000.
Check Since a kilogram is a larger unit than a gram, the
number of kilograms should be less than the
number of grams. The answer seems
reasonable.
Answer: So, 147 g 0.147 kg.
Complete 256 g
Answer: 0.256
? kg.
Complete ? mm
48.9 cm.
Since 1 centimeter
10 millimeters, multiply by 10.
Check Since a millimeter is a smaller unit than a
centimeter, the number of millimeters should be
greater than the number of centimeters. The
answer seems reasonable.
Answer: So, 489 mm
48.9 cm.
Complete ? mm
Answer: 173
17.3 cm.
TRAINING Use the table to determine the total number
of kilometers Brady swam during three days of
practice for a 200-meter race.
Practices
Day
Distance
Monday
300 m
Tuesday
Wednesday
420 m
580 m
Words
Total equals sum of three days divided by 1,000.
Variable
1,000
Equation
1,000
Write the equation.
First, find the sum
in parentheses.
Divide.
Answer: Brady swam 1.3 kilometers during the
three days of practice.
HIKING Use the table to determine the total number of
kilometers Suhela hiked during three days of camping.
Hiking
Day
Friday
Distance
750 m
Saturday
Sunday
900 m
850 m
Answer: 2.5 km
Example 1 Add Units of Time
Example 2 Subtract Units of Time
Example 3 Elapsed Time
Find the sum of 3 h 15 min 52 s and 1 h 42 min 11 s.
Estimate 3 h 15 min 52 s is about 3 h,
and 1 h 42 min 11 s is about 2 h.
3 h 15 min 52 s
1 h 42 min 11 s
4 h 57 min 63 s
Add seconds first, then minutes,
and finally hours.
63 seconds equals 1 minute 3 seconds.
Answer: So, the sum is 4 hours 58 minutes 3 seconds.
Compare the answer to the estimate.
Find the sum of 2 h 18 min 37 s and 5 h 31 min 11 s.
Answer: 7 h 49 min 48 s
MARATHON The table shows the times of the winners
of the men’s and women’s races at the 2002 Boston
Marathon. How much faster was Rop’s time than
Okayo’s time?
Race
men’s
women’s
Runner
Rop
Okayo
Time
2 h 9 min 2 s
2 h 20 min 43 s
Estimate Since the numbers are so close, use the minutes.
20 min – 9 min = 11 min
2 h 20 min 43 s
– 2 h 9 min 2 s
11 min 41 s
Answer: Rop’s time was 11 minutes 41 seconds faster
than Okayo’s time. Compared to the estimate,
the answer seems reasonable.
Jeremy ran a local marathon in 2 hours 53 minutes 47
seconds. His best friend Sam ran the same marathon
in 2 hours 38 minutes 55 seconds. How much faster
did Sam run?
Answer: 14 min 52 s
TRAVEL A flight leaves Denver at 2:40 P.M. and arrives
in Houston at 5:15 P.M. How long is the flight?
You need to find out how much time has elapsed.
Answer: The length of the flight is
15 minutes or 2 hours 35 minutes.
TRAVEL A flight leaves Cleveland at 12:25 P.M. and
arrives in Miami at 3:40 P.M. How long is the flight?
Answer: 3 h 15 min