# Measurement of Height Mathematics Primary 5 Third Term Lesson Notes Week 6

** Subject : Mathematics **

Term : Third Term

Class :Primary 5

Week : Week 6

Topic : Measure Heights and Distances

Previous Lesson

### Learning Objectives:

- Understand the concept of converting units of measurement.
- Apply unit conversion techniques to solve real-life problems related to measurement.
- Solve quantitative aptitude problems involving height and distances.
- Measure the height of pupils, desks, flowering plants, and short distances accurately using a measuring tape.
- Compare the heights of pupils in the classroom.

### Embedded Core Skills:

- Measurement and estimation.
- Problem-solving and critical thinking.
- Numerical operations.
- Data interpretation and analysis

### Learning Materials:

- Measuring tapes.
- Pencils and notebooks.
- Classroom desks.
- Flowering plants.
- Rulers.
- Ten evaluation question sheets.

### Content

Good morning, class! Today, we are going to learn about measuring the height of different objects and distances. This skill is important because it helps us understand the size and dimensions of things around us. We will start by measuring the height of some pupils, the desk, flowering plants, and short distances.

Let’s begin with measuring the height of some pupils. To do this, we will use a measuring tape. A measuring tape is a long strip with numbers on it that helps us determine the length or height of an object. Remember, we measure height from the bottom to the top of an object.

Now, I want everyone to pair up and find a partner. One person will be the “measurer” and the other will be the “person being measured.” Take turns measuring each other’s height using the measuring tape. Make sure to keep the measuring tape straight and steady while taking the measurement. Once you have the measurement, record it in your notebooks.

For example, let’s say student A measures student B and finds that their height is 120 centimeters. Student B then measures student A and finds their height to be 115 centimeters. Remember to record these measurements accurately.

Next, we will move on to measuring the height of the classroom desk. I want each group to find a desk in the classroom and measure its height. Use the measuring tape from the floor to the top of the desk. Write down the measurement for each desk in your notebooks.

For instance, if the measurement of a desk is 75 centimeters, write that down.

Now, let’s talk about measuring the height of flowering plants. We will go outside to the school garden and find some flowering plants. Each group should choose a plant and measure its height. Again, use the measuring tape from the ground to the top of the plant. Record the measurements for each plant.

Finally, we will discuss measuring short distances. Short distances can be measured using a ruler or a measuring tape. We can measure the length of a book, a pencil, or the width of a piece of paper. Choose any object in your immediate surroundings and measure its length or width using a ruler or measuring tape. Record the measurements.

For example, you can measure the length of a pencil and find it to be 15 centimeters.

Remember, accurate measurements are important, so take your time and be careful while measuring. Once you have completed the measurements, we can compare the heights of the pupils in the classroom. Look for patterns or differences in the measurements and discuss them with your classmates.

That’s all for today’s lesson on measuring heights and short distances. Practice these skills in your daily life, and you will become experts in measuring different objects and distances. Have fun exploring and measuring the world around you!

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**Evaluation**

- To measure the height of an object, we use a ______. a) ruler b) measuring tape c) protractor
- The height of a person is measured from the ______ to the ______. a) head, feet b) feet, head c) shoulder, head
- When measuring the height of a desk, we use a measuring tape from the ______ to the ______. a) top, bottom b) bottom, top c) side, side
- Measuring the height of flowering plants helps us understand their ______. a) age b) size c) color
- Short distances can be measured using a ______. a) thermometer b) compass c) ruler
- The length of a book can be measured using a ______. a) scale b) measuring tape c) ruler
- When measuring the height of pupils, we start from the ______ and end at the ______. a) shoulders, feet b) feet, head c) head, shoulders
- Measuring the height of different objects helps us compare their ______. a) weight b) size c) shape
- The height of a desk can be measured in ______. a) meters b) kilograms c) liters
- Measuring short distances accurately requires ______. a) estimation b) precision c) guesswork

Good morning, class! Today, we are going to learn about converting units of measurement, solving real-life problems involving measurement, and solving quantitative aptitude problems related to height and distances. These skills are essential as they help us make sense of measurements in different units and apply them to practical situations. Let’s dive into each topic step by step.

- Converting Units of Measurement:

Sometimes we need to convert measurements from one unit to another. For example, we might need to convert centimeters to meters or kilometers to meters. To do this, we use conversion factors. A conversion factor is a ratio that relates two different units of measurement.

Let’s take an example. Suppose we have a length of 250 centimeters, and we want to convert it to meters. Since there are 100 centimeters in a meter, we can set up the conversion factor as follows:

250 centimeters x (1 meter / 100 centimeters) = 2.5 meters

By multiplying the given length by the appropriate conversion factor, we can convert the measurement from centimeters to meters. Remember to cancel out the units appropriately during the calculation.

- Solving Real-Life Problems on Measurement:

Measurement is crucial in real-life scenarios, such as measuring ingredients for a recipe, determining the length of a room, or calculating distances traveled. To solve real-life problems involving measurement, it’s essential to understand the context and choose the appropriate units for measurement.

For instance, imagine you are baking a cake and the recipe requires 500 grams of flour. However, you only have a scale that measures in kilograms. To solve this problem, you would need to convert grams to kilograms by dividing the given weight by 1000:

500 grams / 1000 = 0.5 kilograms

Now you know that you need 0.5 kilograms of flour for your cake.

- Solving Quantitative Aptitude Problems related to Height and Distances:

Quantitative aptitude problems related to height and distances often involve concepts like speed, time, and distance. To solve these problems, we can use formulas and equations.

Let’s consider an example. Suppose a car is traveling at a speed of 60 kilometers per hour, and it needs to cover a distance of 240 kilometers. We can use the formula Distance = Speed x Time to find the time taken:

240 kilometers = 60 kilometers per hour x Time

Dividing both sides of the equation by 60 kilometers per hour, we find:

Time = 240 kilometers / 60 kilometers per hour

Time = 4 hours

Therefore, it will take 4 hours for the car to cover a distance of 240 kilometers.

Remember to carefully read the problem, identify the relevant quantities, and apply the appropriate formulas or equations to solve the quantitative aptitude problems.

By understanding the conversion of units, solving real-life problems, and tackling quantitative aptitude problems related to height and distances, you will be able to apply your knowledge of measurement in various practical situations. Practice these skills, and you’ll become more confident in handling measurement-related challenges. Keep up the great work, and happy learning!

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**Worked Examples **

Certainly! Here are 10 worked examples that cover converting units of measurement, solving real-life problems on measurement, and solving quantitative aptitude problems related to height and distances:

- Converting Units of Measurement:

Example 1: Convert 350 centimeters to meters.

Solution: Using the conversion factor 1 meter = 100 centimeters,

350 centimeters = 350/100 = 3.5 meters.

Example 2: Convert 2.5 kilometers to meters.

Solution: Using the conversion factor 1 kilometer = 1000 meters,

2.5 kilometers = 2.5 × 1000 = 2500 meters.

- Solving Real-Life Problems on Measurement:

Example 3: A rectangular room is 4 meters long and 3 meters wide. What is the area of the room in square meters?

Solution: Area = Length × Width = 4 meters × 3 meters = 12 square meters.

Example 4: A recipe calls for 500 grams of sugar. If your scale measures in kilograms, how many kilograms of sugar do you need?

Solution: 500 grams = 500/1000 = 0.5 kilograms.

- Solving Quantitative Aptitude Problems related to Height and Distances:

Example 5: A car is traveling at a speed of 80 kilometers per hour. How far will it travel in 3 hours?

Solution: Distance = Speed × Time = 80 kilometers per hour × 3 hours = 240 kilometers.

Example 6: A cyclist covers a distance of 48 kilometers in 2 hours. What is the average speed of the cyclist?

Solution: Average Speed = Distance / Time = 48 kilometers / 2 hours = 24 kilometers per hour.

- Conversion between Different Units:

Example 7: Convert 5 liters to milliliters.

Solution: Using the conversion factor 1 liter = 1000 milliliters,

5 liters = 5 × 1000 = 5000 milliliters.

Example 8: Convert 800 grams to kilograms.

Solution: 800 grams = 800/1000 = 0.8 kilograms.

- Solving Real-Life Problems on Measurement:

Example 9: A rectangular garden measures 10 meters in length and 6 meters in width. What is the perimeter of the garden?

Solution: Perimeter = 2 × (Length + Width) = 2 × (10 meters + 6 meters) = 2 × 16 meters = 32 meters.

Example 10: You need to paint a wall that measures 4 meters in length, 3 meters in height, and 0.2 meters in width. How much paint in liters do you need if 1 liter of paint covers 10 square meters?

Solution: Total surface area = 2 × (Length × Height + Length × Width + Height × Width)

Total surface area = 2 × (4 meters × 3 meters + 4 meters × 0.2 meters + 3 meters × 0.2 meters) = 2 × (12 + 0.8 + 0.6) = 2 × 13.4 = 26.8 square meters.

Paint needed = Total surface area / Coverage of 1 liter of paint = 26.8 square meters / 10 square meters = 2.68 liters.

These examples cover a range of scenarios where converting units, solving real-life problems, and solving quantitative aptitude problems related to measurement of height and distances are required. Practice these examples and apply the concepts to similar situations to strengthen your understanding of measurement. Keep up the great work!

[mediator_tech]

- 1 kilometer is equal to __________ meters.

a) 10

b) 100

c) 1000 A recipe calls for 250 grams of sugar. If you have a scale that measures in kilograms, you will need __________ kilograms of sugar.

a) 0.25

b) 0.5

c) 2.5A rectangular room has a length of 5 meters and a width of 3 meters. The area of the room is __________ square meters.

a) 8

b) 15

c) 30The speed of a car is 60 kilometers per hour. How far will it travel in 2 hours? The distance covered will be __________ kilometers.

a) 30

b) 60

c) 1201 liter is equal to __________ milliliters.

a) 10

b) 100

c) 1000A rectangular garden measures 8 meters in length and 6 meters in width. The perimeter of the garden is __________ meters.

a) 14

b) 28

c) 48You need to paint a wall that measures 3 meters in height, 4 meters in width, and 0.2 meters in thickness. The total surface area of the wall is __________ square meters.

a) 2.4

b) 14.8

c) 24.4The distance between two cities is 200 kilometers. If a train is traveling at a speed of 100 kilometers per hour, it will take __________ hours to reach the destination.

a) 2

b) 4

c) 61 kilogram is equal to __________ grams.

a) 10

b) 100

c) 1000The length of a rectangle is 12 meters and its width is 4 meters. The area of the rectangle is __________ square meters.

a) 16

b) 24

c) 48

### Lesson Plan Presentation: Measurement and Unit Conversion

Grade: Primary 5

Subject: Mathematics

Topic: Conversion of Units of Measurement, Real-Life Problem Solving, and Quantitative Aptitude Problems Related to Measurement of Height and Distances

Duration: 60 minutes

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**Presentation**:

**I. Introduction (5 minutes):**

- Greet the students and engage them in a brief discussion about the importance of measurement in our daily lives.
- Explain the objectives of the lesson and how it relates to their real-life experiences.

**II. Measurement and Unit Conversion (10 minutes):**

- Introduce the concept of unit conversion and provide examples to clarify the concept.
- Emphasize the need to convert units for accurate and consistent measurements.
- Present conversion factors for common units of measurement, such as centimeters to meters, kilometers to meters, liters to milliliters, and grams to kilograms

**III. Real-Life Problem Solving (15 minutes):**

- Present real-life problems related to measurement, such as converting ingredients in a recipe, calculating the area of a room, or determining distances traveled.
- Guide students through solving the problems step-by-step, encouraging them to identify the given information, choose appropriate units, and apply the necessary conversion factors.
- Provide opportunities for students to solve similar problems independently or in pairs.

**IV. Quantitative Aptitude Problems (15 minutes):**

- Introduce quantitative aptitude problems related to height and distances, involving concepts of speed, time, and distance.
- Demonstrate problem-solving strategies, including identifying the relevant quantities, applying the appropriate formulas or equations, and converting units if necessary.
- Allow students to solve similar problems individually or in small groups, providing support and guidance as needed.

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**V. Measuring Heights and Distances (10 minutes):**

- Distribute measuring tapes and instruct students on how to use them accurately.
- Divide students into pairs or small groups and assign them to measure the height of pupils, desks, flowering plants, and short distances within the classroom.
- Monitor and assist students during the measurement process to ensure accuracy.

**VII. Assessment (5 minutes):**

- Distribute the evaluation question sheets to students.
- Instruct them to answer the ten evaluation questions individually, based on the concepts covered in the lesson.
- Collect the answer sheets for assessment purposes.

**Ten Evaluation Questions:**

- Convert 3 kilometers to meters.
- A rectangular room measures 7 meters in length and 5 meters in width. Find its area in square meters.
- If a car is traveling at a speed of 60 kilometers per hour, how far will it travel in 4 hours?
- Convert 800 grams to kilograms.
- How many milliliters are there in 2.5 liters?
- A recipe calls for 250 milliliters of milk. If you only have a measuring cup that measures in liters, how many liters of milk do you need?
- A rectangular garden measures 12 meters in length and 8 meters in width. What is the perimeter of the garden in meters?
- A train travels a distance of 500 kilometers in 5 hours. What is the average speed of the train in kilometers per hour?
- Convert 4 liters to milliliters.
- The length of a rectangle is 10 meters and its width is 3 meters. Find the area of the rectangle in square meters.

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**Conclusion (5 minutes):**

- Summarize the key concepts covered in the lesson, including unit conversion, real-life problem solving, quantitative aptitude problems, and accurate measurement.
- Reinforce the importance of measurement skills in everyday life and various fields.
- Encourage students to continue practicing their measurement skills and exploring real-life applications.

Note: The assessment question answers can be reviewed in the next session to provide feedback and reinforce the concepts covered in this lesson