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 → Place Value and Number Sense ↓


Counting by Tens


Counting by tens is an important concept in place value and number sense, especially for first grade students. It is a basic skill that helps young learners develop an understanding of numbers, their structure, and how they can be manipulated. This understanding serves as a building block for future math topics and practical life situations.

Understanding place value

First, let's discuss place value. Place value is a system in which the position of a digit in a number determines its value. In our number system, which is a base-10 system, each place represents ten times the value of the place to its right. For example, in the number 245, '2' is not just two; it represents two hundred.

  hundreds tens unit
    2 4 5

Base-10 system

The base-10 system is based on the number ten. The position of a digit in a number decides whether it is in the units place, tens place, hundreds place, etc. Here is a simple analysis:

  • Ones place: This is the starting point of our counting. In the number 5, this is simply five units.
  • Tens place: As numbers increase, they move to the tens place when they reach 10. So 10 is a ten and zero is a unit.
  • Hundreds place: When the count reaches one hundred, that is ten tens.

Counting by tens: The basics

Counting by tens means that you add ten to your starting number over and over again. This is like jumping from tens to ones on the number line. For example, starting at zero, you count like 0, 10, 20, 30, and so on. Here's what counting by tens looks like visually:

 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100

Each subsequent number is ten more than the previous one. This is like thinking in groups rather than single objects, helping you understand the bigger picture.

How to practice counting to tens

Practicing counting by tens can be a fun exercise. Here are some ways to help you get familiar with this concept:

Use of number lines

Use a number line to show how counting by tens works. You can draw a simple line and mark it with intervals of ten:


  
  0
  
  10
  
  20
  
  30
  
  40
  
  50
  
  60
  
  70
  
  80
  
  90
  
  100

Place your finger on zero and jump forward ten spaces each time. Emphasize the numbers you land on to reinforce the concept.

Using manipulations

Physical objects such as blocks or beads can be used to count by tens. Group the objects into groups of ten and count how many groups you have.


  
  
  
  
  
  
  
  
  
  
  = 10

Repeat this process so that you get a visual understanding that counting by tens speeds up the counting process and makes it more efficient.

Using the chart

Create or use pre-made charts with rows or columns filled with numbers. Skip count by tens to fill in or recognize patterns in these charts:


    10
    20
    30
    40
    50
    60
    70
    80
    90
    100

This exercise can also develop number recognition.

The importance of counting by tens

Counting to tens is important for several reasons:

  • Understanding number sense: When children learn to count by tens, they grasp the concept of tens in our number system, which is essential for understanding how numbers work and relate to each other.
  • Simplifying calculations: It simplifies calculations and helps in mental math. If you know that 7 tens are 70, then if you add 2 tens, you immediately know that you have 90 without counting each number.
  • Foundation for future skills: Skills such as addition, subtraction, multiplication and division can benefit from understanding counting by tens, which can form the basis for more advanced calculations.

Connect with everyday life

Counting by tens isn't just useful in math classes. It's a skill that people use in everyday life, without necessarily knowing how to do it. Here are some examples of counting by tens in everyday situations:

  • While counting money, we often use ten and fifty rupee notes.
  • Counting steps or stairs to reach an average count.
  • Packing items into groups of ten for efficiency.

Advanced drills and games

Once a child knows the basics of counting by tens, he or she can practice in more advanced ways, including interactive and fun games:

Skip counting chart

Using charts that progress to the tens digits and fill in the blanks helps students strengthen their skills.

Game of tens

A game in which students roll dice to collect tens can make the learning process more interesting. With a reward or goal at the end, children can find motivation to achieve the next set of tens.

Challenges in understanding counting by tens

While many children learn to count by tens quite quickly, some may face challenges:

  • Skipping numbers: Understanding what numbers they are skipping and why can be a conceptual hurdle.
  • Lack of foundation: Without a solid understanding of how to count normally from one to ten, getting straight to tens can be overly complicated.

Conclusion

Counting by tens is an important skill that aids in understanding the larger structure of numbers. It lays the groundwork for math understanding that extends beyond the classroom and plays a role in daily life skills. Through a variety of activities, games, and visual examples, students can efficiently master counting by tens and use it as a stepping stone to understanding more complex mathematical concepts. This foundational skill is not only crucial for academic success, but also for a lifetime of work.


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Counting by Tens

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