key notes :

✏️ Make a Number Using Subtraction (Numbers up to 20)

🔢 What is Subtraction?

  • Subtraction means taking away.
  • It tells us how many are left.
  • We use the minus sign (−).

👉 Example:
10 − 3 = 7 (Take away 3 from 10, 7 are left)

🎯 Making a Number Using Subtraction

  • We can make a number by subtracting from a bigger number.

👉 Example:

  • 5 can be made as:
    • 7 − 2 = 5
    • 6 − 1 = 5
    • 9 − 4 = 5

🔍 Use Objects to Understand

  • Use fingers, toys, or drawings.
  • Count how many you have first.
  • Then take some away and count what is left.

👉 Example:

  • 8 candies, eat 3 → 5 left
  • So, 8 − 3 = 5

📊 Numbers Up to 20

  • All numbers are from 0 to 20.
  • Start with a bigger number and subtract a smaller number.

👉 Examples:

  • 12 − 2 = 10
  • 15 − 5 = 10
  • 20 − 10 = 10

🧠 Think “What Makes This Number?”

  • Ask: “What number do I subtract to get this answer?”

👉 Example:

  • 10 − ___ = 6
    ✔️ 10 − 4 = 6

✨ Important Tips

  • Always start from the bigger number.
  • Count backwards to subtract.
  • Practice with small numbers first.

🎉 Fun Practice Examples

  • 9 − 4 = ___
  • 14 − 6 = ___
  • 11 − 1 = ___
  • 7 − 2 = ___

Learn with an example

🥦How do you make 9?

  • 10 − 2
  • 10 − 1
  • 8 − 1
  • 9 − 1

This is a way to make 9:

  • 10 − 1 = 9

These are not ways to make 9:

  • 10 − 2 = 8
  • 8 − 1 = 7
  • 9 − 1 = 8

🥦How do you make 4?

  • 6 − 2
  • 7 − 5
  • 10 − 4
  • 10 − 5

This is a way to make 4:

  • 6 − 2 = 4

These are not ways to make 4:

  • 7 − 5 = 2
  • 10 − 4 = 6
  • 10 − 5 = 5

🥦How do you make 7?

  • 8 − 2
  • 10 − 3
  • 9 − 3
  • 9 − 1

This is a way to make 7:

  • 10 − 3 = 7

These are not ways to make 7:

  • 8 − 2 = 6
  • 9 − 3 = 6
  • 9 − 1 = 8

Let’s practice!