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Give and Take – Class 3 Maths Chapter 12 Notes & NCERT PDF

Class 3MathematicsChapter 12NCERT book: Maths Mela - Class 3

Notes and a simple summary of Chapter 12 of the NCERT Class 3 Mathematics book, with the official chapter PDF, flashcards, an MCQ quiz and an AI tutor for your doubts.

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Chapter 12: Give and Take

Introduction

Give and Take is about adding and subtracting 3-digit numbers and using money. It follows Kishan, who runs a big plant nursery, and Peter uncle, who runs a shop. Children learn to draw box diagrams to understand a problem before solving it, and to use hundreds-tens-ones blocks (Dienes blocks) and number lines.

What's in this Chapter

  • Warm-up: adding and subtracting small numbers such as 2, 5, 6 and 9 to 3-digit numbers.
  • Kishan's saplings (adding): Kishan had 364 saplings and brought 52 more. A box diagram shows 364 and 52 joining. With blocks: combine 10 tens to form 1 hundred, then combine 3 hundreds with 1 hundred to get 4 hundreds. Answer: 4 hundreds, 1 ten and 6 ones = 416. A number line can also be used.
  • Kishan's saplings (subtracting): an order of 230 saplings, with 75 already packed. To take away 5 ones, change 1 ten into 10 ones; to take away 70, open a hundreds block into 10 tens. Answer: 155 more saplings to pack.
  • Practice problems: 456 saplings with 63 given away (393 left); 309 saplings plus 80 (389); 270 compared with 36 (234 more).
  • Writing word problems from box diagrams such as 234 boys + 156 girls, or 356 books - 138 books.
  • Number grid (451-530): solving 456 + 10, 481 + 19, 405 + 23, 519 - 40 and noticing how digits change when adding 100, 10 and 1.
  • Jadupur village: long ago people exchanged things: Shaamu Kaka gave 5 sacks of rice for 10 sacks of vegetables; Dariya Didi gave 5 sacks of onions for 2 sarees. Why were different quantities given? Today we use money, notes and coins.
  • Money: one Rs 10 note can buy one hawa mithai or ten toffees. Salma buys two bottles of milk for Rs 100; Kiran buys a basket of pomegranates for Rs 100. Matching notes and coins of the same value; five Rs 100 notes equal one Rs 500 note.
  • Peter uncle's shop: he had Rs 465 in the morning and Rs 756 by afternoon, so he earned Rs 291. Other problems: Rs 640 + Rs 215; Reena pays Rs 209 with a Rs 500 note; Shireen saves Rs 100 every week; savings of Rs 250, Rs 125 and Rs 350.
  • Estimating to the nearest hundred, comparing expressions without calculating (e.g. 373 + 23 or 373 + 40), finding equal pairs (516 + 100 = 816 - 200), and a number-card game for the biggest sum and smallest difference.
  • Key Ideas

  • Draw a box diagram first to see what is joined and what is taken away.
  • When adding, 10 ones make 1 ten and 10 tens make 1 hundred.
  • When subtracting, 1 ten can be opened into 10 ones and 1 hundred into 10 tens.
  • Money uses notes and coins of different values; the same amount can be paid in different ways.
  • Estimating helps check whether an answer makes sense.
  • Activities from the Book

  • Solve problems with Dienes blocks, number lines and play money.
  • Write your own word problems from box diagrams.
  • Play the 0-5 number-card game for biggest sum and smallest difference.
  • Words to Learn

  • Add (जोड़ना) - put together
  • Subtract (घटाना) - take away
  • Sum (योग) - the answer when adding
  • Difference (अंतर) - the answer when subtracting
  • Estimate (अनुमान) - a close guess
  • Note (नोट) and coin (सिक्का)
  • Exchange (अदला-बदली) - giving one thing for another
  • Sapling (पौधा) - a young plant
  • Nursery (पौधशाला) - a place where plants are grown
  • Tips for Parents & Teachers

  • Play shop at home with paper notes of Rs 100, Rs 10 and Rs 1.
  • Before solving, ask: "Will the answer be more or less than 500?"
  • As the book advises, avoid "keywords"; ask the child to draw the story instead.
  • Common Mistakes

  • Forgetting to carry: writing 364 + 52 as 3116 instead of 416.
  • Subtracting the smaller digit from the bigger one in each place (e.g. 230 - 75 written as 245).
  • Forgetting that the same amount can be paid with different notes and coins.
  • 💡 Key Learning Points

    • ✓Box diagrams help children see what is being added or taken away before they solve a problem.
    • ✓Adding 3-digit numbers: 10 ones make a ten and 10 tens make a hundred (364 + 52 = 416).
    • ✓Subtracting 3-digit numbers: open a ten into 10 ones or a hundred into 10 tens (230 - 75 = 155).
    • ✓Money replaced barter; notes and coins of different values can make the same amount in different ways.
    • ✓Estimating to the nearest hundred and comparing expressions without calculating builds number sense.

    👨‍🏫 Teaching Tips

    • →Encourage Dienes blocks and number lines before any written method, as the teacher's notes stress.
    • →Ask children to draw a box diagram for every word problem.
    • →Avoid giving keywords like 'in all' or 'left'; let children understand the story.
    • →Use play money for Peter uncle's shop problems and for exchanging notes.
    • →Discuss the Jadupur barter story and why money makes exchange easier.
    • →Use the number grid to show patterns when adding 100, 10 and 1.
    • →Encourage mental calculation for the compare-and-match tasks and let children frame similar questions.

    📋 Assessment Questions

    1. Can the child draw a box diagram for 'Kishan had 456 saplings and gave away 63'?
    2. Can the child add 3-digit numbers with regrouping, such as 364 + 52?
    3. Can the child subtract with regrouping, such as 230 - 75, and explain the exchange?
    4. Can the child pay an amount like Rs 55 in two different ways with notes and coins?
    5. Can the child estimate a sum to the nearest hundred?

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