Course Content
Module 1: Introduction to Subtraction
πŸ‘‰ 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? πŸ‘‰ 5 βˆ’ 2 = 3 applesβž– Subtraction Symbol We use the minus sign ( βˆ’ ) for subtraction. We also use the equal sign ( = ) to show the answer.✨ Real-Life Examples: You had β‚Ή10, spent β‚Ή4 β†’ β‚Ή10 βˆ’ β‚Ή4 = β‚Ή6There are 8 balloons, 3 burst β†’ 8 βˆ’ 3 = 5 balloons leftYou see 6 birds, 2 fly away β†’ 6 βˆ’ 2 = 4 birds left🧠 Why Learn Subtraction? To solve daily problemsTo handle moneyTo prepare for advanced math
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Matching and Mismatching Numbers in Subtraction
βœ… Matching Numbers When both digits in the same place are the same, subtraction is easy.🟒 Example: 44 βˆ’ 22 Each digit matches: 4 βˆ’ 2 = 2 and 4 βˆ’ 2 = 2 So, 44 βˆ’ 22 = 22❌ Mismatching Numbers When digits are different, especially when the top digit is smaller, we may need borrowing.🟑 Example: 42 βˆ’ 27 2 (ones) is smaller than 7 β†’ So we borrow from the tens. Now do: 12 βˆ’ 7 = 5 3 βˆ’ 2 = 1 So, 42 βˆ’ 27 = 15πŸ’‘ 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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Easy Method of Subtraction Examples
βœ… 1. Line Up the Numbers Always write numbers one below the other, keeping ones, tens, hundreds in the right place.πŸ”’ Example:markdown Copy Edit 73 βˆ’ 25 ____ βœ… 2. Start from the Right (Ones Place) Subtract the ones column first, then the tens.πŸ”’ Example: 3 βˆ’ 5 ❌ β†’ Can’t do πŸ‘‰ Borrow 1 from the 7 β†’ 3 becomes 13, and 7 becomes 6 Now:13 βˆ’ 5 = 86 βˆ’ 2 = 4 βœ… Answer: 48βœ… 3. Use This Rhyme to Remember Borrowing: ✨ "More on the floor? Go next door! Borrow 10 and try once more!"βœ… 4. Cross-Check with Addition After subtracting, you can add your answer to the smaller number to check.πŸ”’ Example: 48 + 25 = 73 βœ… (Correct!)✨ Quick Tricks for Small Numbers: βž– Subtract from 10 Easily: 10 βˆ’ 3 = 710 βˆ’ 6 = 4Use your fingers if needed!πŸ”’ Subtracting in Parts (Break the Number): 45 βˆ’ 28 = First do 45 βˆ’ 20 = 25 Then 25 βˆ’ 8 = 17
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Easy Mathematics

    Here are more examples of Matching and Mismatching Numbers in subtraction to help students practice and understand the difference clearly:


    βœ… Matching Numbers – Easy Subtraction

    These are examples where digits are easy to subtract (no borrowing needed):

    ProblemSolution
    66 βˆ’ 2244
    88 βˆ’ 4444
    33 βˆ’ 1122
    75 βˆ’ 2550
    60 βˆ’ 3030

    πŸ‘‰ In each case, the digits in the top number are equal to or bigger than the digits in the bottom number.


    ❌ Mismatching Numbers – Borrowing Needed

    These examples require borrowing (top digit is smaller than bottom digit in the same place):

    ProblemSteps (Borrowing)Answer
    41 βˆ’ 26Borrow: 1 becomes 11, 4 becomes 315
    52 βˆ’ 372 < 7 β†’ borrow from 515
    63 βˆ’ 483 < 8 β†’ borrow from 615
    72 βˆ’ 462 < 6 β†’ borrow from 726
    81 βˆ’ 591 < 9 β†’ borrow from 822

    πŸ’¬ Practice Tip for Kids:

    If the top number is smaller than the bottom one,
    Go next door and borrow 10!