Grade 3
  1. Number Sense and Numeration  1.1. Understanding Numbers  1.1.1. Reading and Writing Numbers up to 10,000  1.1.2. Place Value up to Thousands  1.1.3. Comparing and Ordering Numbers  1.1.4. Rounding Numbers to the Nearest Ten and Hundred  1.1.5. Skip Counting by 2s, 5s, 10s, and 100s up to 1,000  1.2. Operations with Whole Numbers  1.2.1. Addition and Subtraction up to 1,000  1.2.2. Multiplication Facts (up to 10 x 10)  1.2.3. Division Facts (up to 100)  1.2.4. Multiplication as Repeated Addition  1.2.5. Division as Equal Sharing  1.2.6. Word Problems with Addition, Subtraction, Multiplication, and Division  1.3. Estimation  1.3.1. Estimating Sums and Differences  1.3.2. Estimating Products and Quotients  1.4. Understanding Even and Odd Numbers
  2. Fractions and Decimals  2.1. Understanding Fractions  2.1.1. Identifying and Representing Fractions  2.1.2. Fractions of a Whole and Part of a Set  2.1.3. Comparing and Ordering Fractions with Like Denominators  2.1.4. Equivalent Fractions  2.1.5. Simple Fraction Word Problems  2.2. Introduction to Decimals  2.2.1. Tenths and Hundredths as Decimals  2.2.2. Relationship between Fractions and Decimals
  3. Measurement  3.1. Length  3.1.1. Measuring in Centimeters and Meters  3.1.2. Comparing and Ordering Lengths  3.1.3. Estimating Lengths  3.1.4. Converting Between Centimeters and Meters  3.2. Mass  3.2.1. Measuring in Grams and Kilograms  3.2.2. Estimating and Comparing Mass  3.3. Capacity  3.3.1. Measuring in Milliliters and Liters  3.3.2. Estimating and Comparing Capacity  3.4. Time  3.4.1. Telling Time to the Nearest Minute  3.4.2. Calculating Elapsed Time  3.4.3. Using a Calendar  3.4.4. Understanding A.M. and P.M.  3.5. Area and Perimeter  3.5.1. Calculating Perimeter of Simple Shapes  3.5.2. Estimating and Measuring Area of Shapes  3.5.3. Finding Area by Counting Squares
  4. Geometry  4.1. Properties of Shapes  4.1.1. Identifying 2D Shapes (Triangles, Quadrilaterals, Circles, etc.)  4.1.2. Identifying 3D Shapes (Cubes, Spheres, Cylinders, etc.)  4.1.3. Describing Attributes of 2D and 3D Shapes  4.1.4. Recognizing Parallel and Perpendicular Lines  4.2. Symmetry and Transformations  4.2.1. Recognizing Lines of Symmetry  4.2.2. Identifying Flips, Slides, and Turns  4.3. Angles  4.3.1. Understanding Right Angles  4.3.2. Comparing Angles (Acute, Right, Obtuse)
  5. Data Management and Probability  5.1. Data Collection and Organization  5.1.1. Collecting Data using Surveys and Experiments  5.1.2. Organizing Data using Tally Charts and Tables  5.2.1. Creating and Interpreting Pictographs  5.2.2. Creating and Interpreting Bar Graphs  5.2.3. Reading Simple Line Graphs  5.3. Probability  5.3.1. Understanding Basic Probability Terms (Certain, Possible, Impossible)  5.3.2. Predicting Outcomes  5.3.3. Simple Probability Experiments
  6. Patterns and Algebra  6.1. Patterns  6.1.1. Identifying and Extending Numeric Patterns  6.1.2. Identifying and Extending Shape Patterns  6.1.3. Creating Patterns Using Rules  6.2. Introduction to Algebra  6.2.1. Understanding Variables as Unknowns  6.2.2. Solving Simple Addition and Subtraction Equations  6.2.3. Using Patterns to Solve Problems
  7. Problem-Solving Skills  7.1. Strategies for Problem-Solving  7.1.1. Using Pictures or Diagrams  7.1.2. Identifying Patterns in Problems  7.1.3. Making Organized Lists  7.1.4. Guessing and Checking  7.1.5. Using Logical Reasoning  7.1.6. Breaking Down Problems into Steps

Grade 3 → Measurement → Length ↓


Measuring in Centimeters and Meters


Welcome to the wonderful world of measuring length! Let's learn how we measure the length of objects using two commonly used units in the metric system: centimeters and meters. Understanding these units is important not only in math but also in everyday life. Whether it's determining the length of a pencil or checking the height of a door, knowing how to measure in centimeters and meters will prove useful.

Metric system

The metric system is a system of measurement that is used around the world. It is standard in most countries and helps maintain uniformity in measurements. Within the metric system, we use different units to measure length, mass, and volume. For length, some of the basic units are millimeters, centimeters, meters, and kilometers.

Understanding centimeters and meters

Let's focus on two units of the metric system that are widely used to measure length: the centimeter and the meter.

Centimeter (cm)

A centimeter is a unit of measuring length. It is abbreviated as cm. A centimeter is one hundredth of a meter. You often use centimeters to measure small objects, such as the width of a book or the length of a pen.

Example: If a pencil is 7 centimeters long, you would write it 7 cm.

Meter (m)

On the other hand, the meter is a larger unit of length in the metric system and is abbreviated as m. You use meters to measure larger objects, such as the height of a room or the length of a playground.

Example: If the height of a door is 2 meters, it will be written as 2 m.

Relation between centimeter and meter

It is very important to understand the relationship between centimeters and meters. This relationship helps you easily convert between these units:

1 meter = 100 centimeters

This means that when you have a length in meters and you want it in centimeters, you multiply it by 100. Conversely, when converting centimeters to meters, you divide it by 100.

Conversion between centimeters and meters

Converting meters to centimeters

To convert a length from meters to centimeters, you multiply it by 100.

Example: Convert 3 meters to centimeters.

3 m × 100 = 300 cm

So, 3 meters is 300 centimeters.

Converting centimeters to meters

To convert a length from centimeters to meters, you divide it by 100.

Example: Convert 250 centimeters to meters.

250 cm ÷ 100 = 2.5 m

So, 250 centimeters is 2.5 meters.

Visual example

1 meter (100 cm)

This visual example shows the length of 1 meter which is equal to 100 centimeters. Seeing this can help you understand how long a meter is and how it relates to centimeters.

Practical uses of measuring in centimeters and meters

Let's look at some practical examples of measuring in centimeters and meters.

Measuring small objects - centimeters

When you have small items like a notebook, eraser or toy, measuring them in centimeters is practical and easy. For example:

1. A toy car is 15 cm long.

2. An eraser is 5 cm long.

Measuring large objects - meter

When it comes to larger objects, such as a piece of furniture or the dimensions of a room, the use of meters is more efficient.

1. The width of a door is 0.9 m.

2. The height of the ceiling of a classroom is 3 m.

Activities to practice measurement

Participate in activities to develop understanding and comfort in measuring in centimeters and meters.

Activity 1: Taking measurements around the house

Use a ruler or measuring tape to measure the following items in your home:

  • The length and width of your desk in centimeters.
  • Your height in meters.

Activity 2: Comparing lengths

Choose two different objects in your home and compare their lengths:

  • Is the table longer than the chair?
  • Which is taller, the lamp or the book shelf?

Conclusion

Measuring in centimeters and meters is essential in our daily lives. Understanding these concepts helps you accurately estimate and determine the length of various objects. By converting objects, looking at them, and measuring them practically, you will be able to use these measurements effectively. Remember, practice makes perfect. Use different occasions in everyday life to measure objects around you, which will strengthen your understanding of measuring length in centimeters and meters.

Now, put on your measuring cap and explore the world of heights!


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Measuring in Centimeters and Meters

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