.Drill: Conversation
Mother bought a dressed chicken weighing 1.3 kg. How many grams is it?
2.Review
Give the equivalent: Conversion of linear measure.
1. 6cm= ____ mm 2. 5m= _____cm
3. ____dm= 4m 4.____cm= 9dm
5. ____dm= 3m
3.Motivation
Which cubic unit of measure will you use to measure the following:
a.cabinet c..thumbtacks box
b.gravel and sand truck
e.rectangular water tank
.Presentation
A truck delivers sand weighing 54000 dm3 or L, what is the weight of the sand in cubic metre (m3)? In cubic centimetre (cm3) ?
a.What is asked in the problem? What are given?
b.What must we know to be able to change 54000 dm3 to cubic centimetres and to cubic metre?
c.Which is larger a cubic decimetre or a cubic centimetre?
d.How many cubic centimetres are there in cubic decimetres or L ?
To change cubic decimetre to cubic centimetre we multiply by 1000.
Since: 1dm=10cm
Therefore: 1dmx1dmx1dm= 10cm x 10cm x 10cm
Thus, 1dm3 = 1000cm3
54000 dm3 = ____ cm3
54,000x1,000 = 54,000,000 cm3
How will you compare cubic decimetres to cubic metres? Since a cubic metre is larger thana cubic decimetre, we divide by 1000. Using conversion
1m3= 1000dm3
54000dm3 = 54m3
1000
Performing the Activities
Group the pupils into three working teams and have them perform the task.
Reinforcing the Concept and Skill
Have the pupils solve the following exercises.
Supply the missing number.
1. 6700 dm3= ____m3
2. 28 dm3= _____cm3
3. 11500 cm3 =_____ m3
4. 4 m3 =______cm3
5. 8m3 =______dm3
Answer the following word problems.
2. A water tank holds 90000 dm3 of water, what is its weight in cm3 ?
Summarizing the Lesson
In converting from a larger unit to a smaller unit, use multiplication
In converting from a smaller to a larger unit, use division
C.Assessment
Change to smaller units.
1. 15 cm3= _____mm3
2. 61 dm3= _____cm3
3. 64 cm3 = _____dm3
4. 25 cm3= _____mm3
5. 87 dm3= _____cm3
Change these units to larger or smaller units:
1.7cm3= ______mm3
2. 5000 dm3= _____m3
3. 5m3 = _____cm3
4. 20000 cm3 = ____m3
5. 17m3= ____dm3
DAY 2
Answer their assignment
Review
Basic conversion unit
Motivation
Which cubic unit of measure will you use to measure the following:
a.cabinet b.thumbtacks box
c.gravel and sand truck
d.rectangular water tank
Presentation:
A water tank holds 90000 dm3 of water, what is its weight in cm3 ?
Provide exercises
Processing the Activities
How do we change and convert a smaller unit to a higher unit?
when converting from larger unit to a smaller unit, use multiplication
when converting from a smaller to a larger unit, use division
Change to smaller units.
1.25 cm3 =______mm3
2.89 dm3= ______cm3
3.57 cm3= ______mm3
4.126 dm3= _____ cm3
5.32 dm3= ______cm3
Answer the following word problems.
1.A truck delivers sand weighing 85000 cm3, what is the weight of the sand in cubic decimeters?
Summarizing the Lesson
In converting from a larger unit to a smaller unit, use multiplication
In converting from a smaller to a larger unit, use division
Assessment
Fill in the blanks to complete the equivalent measures.
1.198cm3= ______dm3
2. 1286dm3= _____m3
3. ____cm3 = 35m3
4._____cm3= 25dm3
5. 89m3= ______dm3
Day 3
1.Drill
Mental computation /drill on finding the area or missing side of a parallelogram
Review
Find the area of the following figures. Write the answer on your notebook.
3 cm
5 cm
5 cm
6 cm
.Motivation
Show a transparent plastic container filled with balls. Ask pupils to guess the number of balls inside the container. Let a volunteer count the balls to find out the answer. Elicit from them how they can make a good guess of the total number of balls. Relate this to the concept of volume.
Presentation
Read and study the problem below.
A storage box is 60 cm by 40 cm by 30 cm. What is the volume of the box?
The volume of a rectangular prism is equal to the product of its length, width and height.
V= LXWXH 60cm x 40 cm x 30 cm = 72000cm3
Using concrete objects
a.Let a pupil fill a rectangular box with cubes.
b.Ask the pupils the following questions:
How many cubes did it take to fill the prism?
How many cubic units is the length/ the width? the height?
c.Define these situations as finding the volume of solids. Define volume as the number of cubic units used to fill up a space. Use correct unit of measure.
d.Using this definition, ask the pupils the volume of rectangular prism.
e.Let them state the formula for the volume of a rectangular prism as V=lxwxh
Performing the Activities
Solve for the volume of these rectangular prisms, given their measurements.
1.l=9m
w=4m
h=3m
2.l= 10cm
w=7cm
h=15cm
3. s=12cm
4. l=14 m
w=10m
h=9m
5. s=6m
Processing the Activities
What is volume?
What is the formula in finding the volume of a cube? Rectangular prism
Find the volume of each prism.
1. l=4m
w=2.5m
h=-3.5m
V= _____
2. l=8cm
w=4cm
h=5cm
V= _____
Solve the following word problems.
Summarizing the Lesson
Volume of a rectangular prism= L X W X H
Volume of a cube=S X S X S or S3
Find the volume of the following figures.
12 cm
8 cm
5 cm
10 cm
Draw the figure with their measurements and find their volume.
1. l=4m
w=1m
h=3m
2.s=14cm
3.3=20cm
4.l=8cm
w=3cm
h=10cm
5.s=12cm
Day 4
1.Drill
Mental computation
Magic Square –Give the next five perfect square.
Review
Find the volume of these prisms. Write the answer on your notebook.
1.l=9m
w=5m
h=4m
2. s=12cm
3.l=15m
w=10m
h=6m
Presentation
Using concrete object (present an aquarium)
An aquarium is 35 cm. long, 25 cm wide and 33 cm high is to be filled with water.
How many cubic centimetre of water will be needed?
1.What is asked in the problem?
2.What data are given?
3. Is the unit of measure appropriate with the data given?
2.Performing the Activities
a. Group the pupils. Give rectangular prism to each group.
b. Have each pupil first guess which prism has the greatest and which prism has the least volume.
c. Give the unit of measure to be used. Have the students estimate the volume of the rectangular prisms.
. Processing the Activities
What is volume?
How do we estimate volume of a prism?
Have the pupils solve the following exercises.
Write the best unit of measure to find the volume of the following: (mm3, cm3, dm3, m3)
1.water in a rectangular pool
2.an ice before it melts
3.a dice
4.a blackboard eraser
5.oil in a rectangular box
Solve the following word problems.
1.The volume of a rectangular prism is 240 cm3.Its length is 4cm and its height is 6 cm. How wide is it?
Summarizing the Lesson
How do we use appropriate unit of measure for volume?
How do we estimate volume?
.Assessment
1.Marilou’s sewing box is 3 dm long, 2.5 dm wide and 4.3 dm high. What is its volume?
2.Find the volume of a closet which is 2.5 m long, 5m and 2m high
Draw the figure with their measurements and find their volume.
1. l=9m
w=4m
h=6m
2. s=18cm
.3. 3=30cm
4. l=12cm
w=5cm
h=8cm
5. s=14cm
DAY 5
WEEKLY TEST