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 → Basic Addition and Subtraction ↓


Understanding Addition


Addition is one of the basic operations in maths. In Class 1, we begin to explore how numbers can be combined to form new numbers. This helps us understand how the world around us works and lays the groundwork for more complex maths in the future.

What is yoga?

Addition means combining two or more numbers to find the total or sum. It answers questions like "How many are there in all?" or "How many are there in all?"

Think of it this way: If you have two apples and you get three more apples, how many apples will you have? You can find out by adding up the apples.

2 + 3 = 5

Parts of a sum problem

In an addition problem, you add numbers and find the sum. Here's what each part is called:

  • Addition: Adding numbers together.
  • Sum: The result of adding the sums.

Example:

4 + 3 = 7

in this instance:

  • The sum of 4 and 3 is 4.
  • The sum is 7.

Visualization of the joint

One way to understand addition is to use pictures or diagrams. Let's look at some examples.

Example 1: Adding apples

, 1 2 3

We have 2 apples, and we add 1 more apple. In total, we have:

2 + 1 = 3

Example 2: Adding a block

, 1 2 3 4 5

We have 3 blocks, and we add 2 more blocks. In total, we have:

3 + 2 = 5

Using number lines for addition

Number lines are another useful tool to help us understand addition. By moving along a number line, we can easily see how numbers grow as we add them together.

Number line example:

0 1 2 3 4

Suppose we start at 1 on the number line and want to add 3. We move 3 steps from 1 and arrive at 4. So:

1 + 3 = 4

Properties of yoga

There are various properties of addition that help us make calculations easier.

Commutative property

The order in which we add the numbers does not change the sum.

4 + 3 = 7 3 + 4 = 7

Both are equal to 7, which shows the commutative property.

Associative property

When adding three or more numbers, the way we group them does not change the sum.

(2 + 3) + 4 = 2 + (3 + 4)

The sum of both comes to 9.

Identity property

Adding 0 to any number gives the same number. 0 is the identity element in the sum.

5 + 0 = 5

Real life applications of addition

Addition skills are useful in our everyday lives. Here are some examples:

  • Shopping: When buying multiple items, we add their prices to find the total cost.
  • Time: We add hours and minutes to calculate how long a task will take.
  • Cooking: Adding quantities of ingredients to make a recipe.

Exercises and drills

It's important to practice addition so you can get better at it. Try solving these problems:

  • 5 + 2 = ?
  • 3 + 7 = ?
  • 6 + 1 = ?
  • 2 + 2 + 2 = ?

Conclusion

Understanding and practicing addition helps us build a strong foundation in math. It is used in many different ways every day! Keep practicing by adding numbers around you, and soon you will become an expert at addition.


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Understanding Addition

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