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 ↓


Addition Facts within 10


Addition is one of the basic building blocks in math, especially for young learners. It helps develop basic skills that are used throughout life, from everyday activities to complex problem-solving in advanced math. "Addition Facts Within 10" focuses specifically on the ability to quickly recall the sum of numbers from 0 to 10. Mastering these addition facts is important because it lays the foundation for learning more complex arithmetic operations.

Understanding addition

Let's first understand what addition is. Addition is the process of adding things together. When we add two numbers, we find the total sum or the total number when these numbers are combined.

For example, suppose you have 2 apples and you find 3 more apples. To find out how many apples you have in total, you add the two groups together:

2 + 3 = 5

So, 2 + 3 means two apples and three apples together make five apples.

Extra facts under 10

In terms of addition facts within 10, we work with numbers from 0 to 10. Mastering these facts means being able to immediately answer, without counting, any addition problem that results in 10 or less.

Visual example

Example 1: 1 + 2

1 + 2 = 3

You have one apple, and you will get two more. In total, you now have three apples.

Example 2: 4 + 5

4 + 5 = 9

When you have four blue marbles and you get five green marbles, you will have a total of nine marbles.

List of addition facts within 10

Let's find out all the possible sum combinations within 10:

  • 0 + 0 = 0
  • 0 + 1 = 1
  • 0 + 2 = 2
  • 0 + 3 = 3
  • 1 + 0 = 1
  • 1 + 1 = 2
  • 1 + 2 = 3
  • 1 + 3 = 4
  • 2 + 0 = 2
  • 2 + 1 = 3
  • 2 + 2 = 4
  • 2 + 3 = 5
  • 3 + 0 = 3
  • 3 + 1 = 4
  • 3 + 2 = 5
  • 3 + 3 = 6
  • 4 + 0 = 4
  • 4 + 1 = 5
  • 4 + 2 = 6
  • 4 + 3 = 7
  • 5 + 0 = 5
  • 5 + 1 = 6
  • 5 + 2 = 7
  • 5 + 3 = 8
  • 6 + 0 = 6
  • 6 + 1 = 7
  • 6 + 2 = 8
  • 6 + 3 = 9
  • 7 + 0 = 7
  • 7 + 1 = 8
  • 7 + 2 = 9
  • 7 + 3 = 10
  • 8 + 0 = 8
  • 8 + 1 = 9
  • 8 + 2 = 10
  • 9 + 0 = 9
  • 9 + 1 = 10

Text examples for practice

Practice by memorizing these simple addition facts or use real objects like blocks or candy to visualize these problems.

For example:

1. Suppose you have 3 candies and your friend gives you 4 more candies. How many candies do you have now?

3 + 4 = 7

2. You have 5 dogs, and 2 more dogs are added. How many dogs are there in total?

5 + 2 = 7

3. Your teacher gave you 6 pencils. You found 2 more pencils in your bag. How many pencils do you have now?

6 + 2 = 8

Tips for learning addition facts within 10

Addition facts can be interesting for children if taught in the right way. Here are some tips to help them remember these facts:

  • Practice regularly: Using addition flashcards or participating in math games on a regular basis can make it easier to memorize addition facts.
  • Use real-world examples: Incorporate everyday things like toys or snacks when practicing addition. Ask questions like, "You have 3 oranges and pick 2 more, how many are there in total?"
  • Make it fun: Create games or use songs that incorporate addition facts to make the learning process more fun.
  • Divide it: Start with small numbers and gradually move to larger amounts as your understanding grows.

Why it is important to master addition within 10

It is important to understand addition facts within 10 because:

  • Cornerstone: This is the cornerstone for learning addition, subtraction, multiplication and division on a large scale.
  • Confidence increases: When students know their facts well, they can focus on solving more complex problems rather than struggling with basic facts.
  • Quick calculation: This allows for quick solution of the problem and makes mental arithmetic easier.

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Addition Facts within 10

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