Grade 1
  1. Numbers and Counting  1.1. Counting to 10  1.2. Counting to 20  1.3. Counting to 50  1.4. Counting to 100  1.5. Writing Numbers 1 to 10  1.6. Writing Numbers 1 to 20  1.7. Writing Numbers 1 to 50  1.8. Writing Numbers 1 to 100  1.9. Reading Numbers 1 to 10  1.10. Reading Numbers 1 to 20  1.11. Reading Numbers 1 to 50  1.12. Reading Numbers 1 to 100  1.13. Comparing Numbers  1.14. Ordering Numbers  1.15. Odd and Even Numbers  1.16. Number Patterns  1.17. Skip Counting by 2s, 5s, and 10s  1.18. Understanding Zero
  2. Basic Addition and Subtraction  2.1. Understanding Addition  2.2. Addition Facts within 10  2.3. Addition Facts within 20  2.4. Adding Zero  2.5. Adding One More  2.6. Adding Two More  2.7. Adding Three More  2.8. Adding Using Pictures  2.9. Addition Word Problems  2.10. Understanding Subtraction  2.11. Subtraction Facts within 10  2.12. Subtraction Facts within 20  2.13. Subtracting Zero  2.14. Subtracting One  2.15. Subtracting Two  2.16. Subtraction Using Pictures  2.17. Subtraction Word Problems  2.18. Introduction to Doubles Facts  2.19. Introduction to Making 10
  3. Place Value and Number Sense  3.1. Understanding Tens and Ones  3.2. Counting by Tens  3.3. Place Value within 20  3.4. Place Value within 50  3.5. Place Value within 100  3.6. Reading and Writing Two-Digit Numbers  3.7. Comparing Two-Digit Numbers  3.8. Decomposing Numbers
  4. Measurement  4.1. Length  4.1.1. Comparing Lengths  4.1.2. Measuring with Non-Standard Units  4.1.3. Using Standard Units (Inches and Centimeters) in Length  4.2. Weight  4.2.1. Comparing Weights  4.2.2. Heavy and Light Objects  4.2.3. Introduction to Grams and Pounds  4.3. Capacity  4.3.1. Comparing Capacity  4.3.2. Full and Empty  4.3.3. Introduction to Liters and Milliliters  4.4. Time  4.4.1. Telling Time to the Hour  4.4.2. Telling Time to the Half Hour  4.4.3. Days of the Week  4.4.4. Months of the Year  4.4.5. Understanding Yesterday, Today, and Tomorrow  4.5. Money  4.5.1. Recognizing Coins  4.5.2. Counting Coins  4.5.3. Introduction to Dollar and Cents Symbols  4.5.4. Simple Addition and Subtraction with Money
  5. Geometry  5.1. 2D Shapes  5.1.1. Recognizing 2D Shapes  5.1.2. Drawing 2D Shapes  5.1.3. Naming 2D Shapes  5.1.4. Properties of 2D Shapes  5.1.5. Sorting 2D Shapes  5.1.6. Composing Simple Shapes  5.2. 3D Shapes  5.2.1. Recognizing 3D Shapes  5.2.2. Naming 3D Shapes  5.2.3. Properties of 3D Shapes  5.2.4. Sorting 3D Shapes  5.3. Position and Direction  5.3.1. Left and Right  5.3.2. Above and Below  5.3.3. Inside and Outside  5.3.4. Near and Far  5.3.5. In Front and Behind
  6. Patterns and Sorting  6.1. Recognizing Patterns  6.2. Extending Patterns  6.3. Creating Patterns  6.4. Sorting by Color  6.5. Sorting by Shape  6.6. Sorting by Size
  7. Data and Graphing  7.1. Introduction to Data  7.2. Collecting Data  7.3. Tally Marks  7.4. Bar Graphs  7.5. Picture Graphs  7.6. Interpreting Simple Graphs
  8. Fractions  8.1. Understanding Halves  8.2. Understanding Fourths  8.3. Dividing Shapes into Equal Parts  8.4. Identifying Equal and Unequal Parts

Grade 1 → Measurement → Capacity ↓


Introduction to Liters and Milliliters


In Class 1 Maths, we begin to explore the concept of measuring liquids. We use units like litres and millilitres to understand how much space a liquid occupies. This is called capacity. Let's dive into this exciting world by starting with some basic concepts and easy examples.

What is the capacity?

Capacity is the amount of liquid a container can hold. Think of it this way: if you have a cup, bottle, or jug, capacity is how much water or juice you can put into it. To learn about capacity, we'll focus on two main units of measurement: liters and milliliters.

Just as we measure length in meters or centimeters and weight in grams, we measure capacity in liters and milliliters. These units help us understand and compare how much liquid different containers hold.

Understanding Liters

Liters are a common way to measure liquid capacity. You may have seen soda bottles or milk cartons measured in liters. Liters are a large unit. Imagine a large bottle of soda - it's about 1 liter!

You can imagine 1 liter as follows:

1 litre

When we say “1 liter,” we’re talking about a full container like the one shown above.

Understanding Milliliters

Sometimes we need to measure small amounts of liquids. For this we use milliliters. There are 1,000 milliliters in a liter. Therefore, milliliters are much smaller than liters.

Here's a small example to help you understand how small 1 millilitre is:

10 ml

This circle represents 10 milliliters. Even though it looks big here, imagine it's just a drop in a large bottle.

Uses of liters and milliliters

Now that we know what liters and milliliters are, let's look at how we use them. Imagine you have two containers:

  • A large jug that can hold 3 litres of water.
  • A small cup that can hold 250 ml of water.

They might look something like this:

3L Jug 250 ml cup

Example: If you want to fill a jug with water, you need to fill it with 3 liters of water. To fill just the cup, you need 250 milliliters of water.

Comparison of liters and milliliters

Understanding the difference between liters and milliliters can help you compare the capacity of different containers.

Here's a simple comparison:

  • 1 liter = 1,000 milliliters
  • This means 2 liters = 2,000 milliliters
  • And 0.5 litre = 500 ml
1 liter = 1,000 milliliters 2 liters = 2,000 milliliters 0.5 liters = 500 milliliters
1 liter = 1,000 milliliters 2 liters = 2,000 milliliters 0.5 liters = 500 milliliters

So, a 1.5 liter bottle can be made of:

1.5 liters = 1,500 milliliters
1.5 liters = 1,500 milliliters

Knowing this will help you decide whether a larger or smaller container would be better for holding the liquid you have.

Activities for practice

Let's try some activities to practise using litres and millilitres. These activities can help solidify your understanding:

Activity 1: Measuring containers

Collect some bottles and containers from your home. They could be juice cartons, milk cartons or soft drink cartons. Write down how many liters and milliliters each container contains. Use this opportunity to gain practical experience with these measurements.

Activity 2: Fill in and compare

Use measuring cups with markings for liters and milliliters. Fill two containers with water - one large and one small. For example, you can use a bowl and a glass. See how many milliliters or liters are in each. Try to guess before you measure!

Activity 3: Convert measurements

Practice converting small values in liters to milliliters:

  • 200 ml to litre
  • 500 ml to litre
  • 750 ml to litre
200 milliliters = 0.2 liters 500 milliliters = 0.5 liters 750 milliliters = 0.75 liters
200 milliliters = 0.2 liters 500 milliliters = 0.5 liters 750 milliliters = 0.75 liters

By converting these you can improve your ability to think in different units of capacity.

Real-life applications

Liters and milliliters aren't just used in the classroom. You'll see these units often in real life, too! Here are some practical applications where it's useful to know these measurements:

  • Filling up the water bottle.
  • Buying milk, juice, or soda.
  • Following a prescription that requires specific fluid measurements.
  • Refueling a vehicle, where fuel is measured in litres.

Understanding liters and milliliters makes shopping easier, adds precision in cooking, and adds accuracy to activities like science experiments at school.

Conclusion

Learning about liters and milliliters is an important part of understanding capacity. These units help us accurately measure liquid volumes, whether for everyday use or for different tasks. With practice, using these measurements becomes second nature. Remember, 1 liter equals 1,000 milliliters. By visualizing and practicing, you can become confident in measuring and comparing liquid capacity.

Keep exploring the world of liters and milliliters, and you'll find it's an exciting adventure filled with practical knowledge and fun discoveries!


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Introduction to Liters and Milliliters

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