Fun with Numbers – Class 1 Maths Chapter 8 Notes & NCERT PDF

Class 1MathematicsChapter 8NCERT book: Joyful Mathematics - Class 1

Notes and a simple summary of Chapter 8 of the NCERT Class 1 Mathematics book, with the official chapter PDF, flashcards, an MCQ quiz and an AI tutor for your doubts.

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Chapter 8: Fun with Numbers

Introduction

"Fun with Numbers" takes children beyond 20 to all the numbers up to 100. It starts with Simran packing oranges into boxes of 10, then counts 21 to 30, 31 to 50 using neem daatun (twigs) and flowers, and 51 to 99 using Ankita's mirror work. Children learn to read and write number names, see numbers as tens and ones, find missing numbers, and play a slide-and-ladder game. The chapter ends with Warli painting.

What's in this Chapter

  • Oranges in boxes: Each box holds 10 oranges. How many boxes would Simran need? Counting on after full boxes: 21 (Twenty One), 22 (Twenty Two) … 30 (Thirty).
  • Numbers 31 to 50: Thirty One … Forty … Fifty, counted with flowers and neem daatun.
  • Ginladi activity: Pick a number card from 1 to 50 and clip it at the right place on the bead string.
  • Ten frames: Fill ten frames to show 29, 41 and 30.
  • Fill up the missing numbers in a number grid.
  • Project: Farha packed "more than fifty amazing things" in a matchbox. How many things can a matchbox hold?
  • Numbers 51 to 99: Ankita pastes mirrors on her house. Children count and write 51 to 60, 61 to 80, and 81 to 100 (Fifty One … Sixty … Seventy … Eighty … Ninety … Hundred).
  • Let us Do: Tie a ginladi across the room and clip number cards 1 to 99 in the right places; talk about numbers between two given numbers.
  • Slide and Ladder game: Fill the missing numbers on a board from 1 to 100 where rows go left-to-right and right-to-left.
  • Look at the Picture: A Warli painting. How many houses and people are there? Which part of India is famous for Warli painting? Children then make their own Warli drawing.

    • Key Ideas

  • After 10 we count in groups of ten: 20, 30, 40 … 100.
  • A two-digit number is made of tens and ones: 41 is 4 tens and 1 one.
  • Number names follow a pattern: twenty-one, thirty-one, forty-one …
  • Each number is one more than the number before and one less than the number after.
  • 100 (hundred) comes after 99.

    • Activities from the Book

  • Use a ginladi to show and add numbers.
  • Count backwards from any number using the ginladi or number line.
  • Play slide and ladder outdoors with chalk squares, ropes and sticks, with task cards such as "jump to a number where the digits are exchanged".
  • Make a Warli drawing using simple shapes.

    • Words to Learn

  • tens – groups of ten (दहाई)
  • ones – single units (इकाई)
  • twenty, thirty, forty, fifty – 20, 30, 40, 50 (बीस, तीस, चालीस, पचास)
  • sixty, seventy, eighty, ninety – 60, 70, 80, 90 (साठ, सत्तर, अस्सी, नब्बे)
  • hundred – 100 (सौ)
  • between – in the middle of two numbers (के बीच)
  • Warli – a tribal painting style using simple shapes (वारली चित्रकला)

    • Tips for Parents & Teachers

  • Bundle 10 sticks or straws together to show tens, and keep loose ones.
  • Read number names aloud together and point to the numeral.
  • Ask "What comes just before 60? Just after 79?"
  • Play slide and ladder at home and ask the child to read every number they land on.
  • Show pictures of Warli art and draw figures using circles, triangles and lines.

    • Common Mistakes

  • Writing 'forty' as 'fourty'.
  • Reversing digits, e.g., writing 31 for 13.
  • After 29 saying "twenty-ten" instead of thirty.
  • Thinking 100 is "ten-ty".

    • 💡 Key Learning Points

    • ✓Count, read and write numbers from 21 to 100.
    • ✓Understand two-digit numbers as tens and ones.
    • ✓Read and write number names up to hundred.
    • ✓Find missing numbers and numbers between two given numbers.
    • ✓Place numbers correctly on a ginladi or number line.

    👨‍🏫 Teaching Tips

    • →Use the ginladi to talk about tens and numbers 21 to 50, as the book suggests.
    • →Bundle sticks in tens to show numbers like 41 and 29.
    • →Encourage counting backwards from any number, first with the ginladi, then without it.
    • →Play slide and ladder outdoors with chalk squares and task cards.
    • →Ask about numbers between any two given numbers.
    • →Link the Warli picture to counting houses and people, then let children draw.
    • →Let children count how many small things fit in a matchbox (Farha's project).

    📋 Assessment Questions

    1. Can the child count on from 21 to 50 without help?
    2. Can the child read and write number names like forty-one and seventy-five?
    3. Can the child show a number like 29 using ten frames or bundles?
    4. Can the child fill the missing numbers in a 1–100 board?
    5. Can the child say the number just before and just after a given number?

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    All chapters in Joyful Mathematics - Class 1

    1. 1. Finding the Furry Cat!
    2. 2. What is Long? What is Round?
    3. 3. Mango Treat
    4. 4. Making 10
    5. 5. How Many?
    6. 6. Vegetable Farm
    7. 7. Lina's Family
    8. 8. Fun with Numbers
    9. 9. Utsav
    10. 10. How do I Spend my Day?
    11. 11. How Many Times?
    12. 12. How Much Can We Spend?
    13. 13. So Many Toys