Course Content
Module 1: Introduction to Subtraction
👉 What is Subtraction? Subtraction means taking away or finding the difference between two numbers. It helps us know how many are left after removing some.🟢 Example: If you have 5 apples and you eat 2 apples, How many are left? 👉 5 − 2 = 3 apples➖ Subtraction Symbol We use the minus sign ( − ) for subtraction. We also use the equal sign ( = ) to show the answer.✨ Real-Life Examples: You had ₹10, spent ₹4 → ₹10 − ₹4 = ₹6There are 8 balloons, 3 burst → 8 − 3 = 5 balloons leftYou see 6 birds, 2 fly away → 6 − 2 = 4 birds left🧠 Why Learn Subtraction? To solve daily problemsTo handle moneyTo prepare for advanced math
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Concept of subtraction as “taking away”
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Borrowing (Regrouping) in Subtraction
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Subtraction Tricks and Shortcuts
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Matching and Mismatching Numbers in Subtraction
✅ Matching Numbers When both digits in the same place are the same, subtraction is easy.🟢 Example: 44 − 22 Each digit matches: 4 − 2 = 2 and 4 − 2 = 2 So, 44 − 22 = 22❌ Mismatching Numbers When digits are different, especially when the top digit is smaller, we may need borrowing.🟡 Example: 42 − 27 2 (ones) is smaller than 7 → So we borrow from the tens. Now do: 12 − 7 = 5 3 − 2 = 1 So, 42 − 27 = 15💡 Why It Matters: Matching numbers help build speed and confidence.Mismatching numbers teach us about borrowing and place value.Understanding the difference helps children learn when to borrow and when not to.
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Matching Numbers – Easy Subtraction
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Easy Method of Subtraction Examples
✅ 1. Line Up the Numbers Always write numbers one below the other, keeping ones, tens, hundreds in the right place.🔢 Example:markdown Copy Edit 73 − 25 ____ ✅ 2. Start from the Right (Ones Place) Subtract the ones column first, then the tens.🔢 Example: 3 − 5 ❌ → Can’t do 👉 Borrow 1 from the 7 → 3 becomes 13, and 7 becomes 6 Now:13 − 5 = 86 − 2 = 4 ✅ Answer: 48✅ 3. Use This Rhyme to Remember Borrowing: ✨ "More on the floor? Go next door! Borrow 10 and try once more!"✅ 4. Cross-Check with Addition After subtracting, you can add your answer to the smaller number to check.🔢 Example: 48 + 25 = 73 ✅ (Correct!)✨ Quick Tricks for Small Numbers: ➖ Subtract from 10 Easily: 10 − 3 = 710 − 6 = 4Use your fingers if needed!🔢 Subtracting in Parts (Break the Number): 45 − 28 = First do 45 − 20 = 25 Then 25 − 8 = 17
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Example 1
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Exaple 2
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Easy Mathematics

    ✨ Subtraction Tricks and Shortcuts

    🔢 1. Subtract Using Complements of 10

    • Use pairs that make 10 to subtract quickly.

    🟩 Example:
    13 − 6
    Think: 6 + 4 = 10 → So, 13 − 6 = 7

    🧠 2. Break the Number

    • Break numbers into easier parts (called “decomposition”).

    🟩 Example:
    18 − 9
    Break 18 into 10 + 8
    → 10 − 9 = 1, then 1 + 8 = 9

    🧮 3. Subtract in Steps

    • Subtract in parts for quick mental math.

    🟩 Example:
    46 − 18
    Step 1: 46 − 10 = 36
    Step 2: 36 − 8 = 28

    🟡 4. Round and Adjust

    • Round the number, subtract, then fix the difference.

    🟩 Example:
    52 − 29
    Think: 52 − 30 = 22 → Now add back 1 = 23

    ➖ 5. Use Number Lines (For Small Numbers)

    • Helps visualize subtraction as “moving backwards”.

    🟩 Example:
    9 − 4 → Start at 9, count 4 steps back = 5

    🎯 Quick Tip Rhymes:

    “More on top? No need to stop.
    More on the floor? Go next door!”
    “Subtract the bottom from the top, unless you need to borrow!”

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