Subtracting 9

key notes :

🎯 What does subtracting 9 mean?

Subtracting 9 means taking away 9 from a number.
👉 Example: 12 − 9 means take away 9 from 12.

🧠 Use “Count Back 9” Strategy 🐾

Start with the big number and count back 9 steps.
👉 Example:
Start at 14 → 13 → 12 → 11 → 10 → 9 → 8 → 7 → 5
So, 14 − 9 = 5 🎉

🌟 Use the “Make 10” Trick 🎈

This makes subtraction easier!
👉 Example:
13 − 9
First make 10 from 13:
13 − 3 = 10
Still need to subtract 6 more (because 3 + 6 = 9)
10 − 6 = 4
So, 13 − 9 = 4 🎀

🍎 Think of 9 as “Almost 10” 💡

Subtracting 9 is like subtracting 10, then adding 1 back.
👉 Example:
16 − 9
16 − 10 = 6
Now add 1 back → 7
So, 16 − 9 = 7 😊

🧮 Practice with a Number Line 📏

Jump back 9 steps on a number line.
Helps students see the movement!

🎉 Subtraction Facts to Remember ✨

  • 10 − 9 = 1
  • 11 − 9 = 2
  • 12 − 9 = 3
  • 13 − 9 = 4
  • 14 − 9 = 5
  • 15 − 9 = 6
  • 16 − 9 = 7
  • 17 − 9 = 8
  • 18 − 9 = 9

These facts help in quick subtraction 🚀

🖍️ Use Objects to Take Away 9 🧸🍬

Give 9 things (counters, blocks, balls) to a friend and see how many are left.

👉 Example:
You have 12 candies 🍬
Give away 9 🍬🍬🍬🍬🍬🍬🍬🍬🍬
Left with 3 😃
So 12 − 9 = 3

Learn with an example

🚀Subtract. 19 – 9 =

  • You can count back to find 19 – 9. Start at 19 and count back 9 times.
  • You end at 10.
  • 19 – 9 = 10

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You can also think about place value to subtract.
19 is 1 ten and 9 ones.
tens ones
1 9
To subtract 9, take away 9 ones.
tens ones
1 0
That leaves 1 ten, or 10.
19 – 9 = 10

🚀Subtract. 13 – 9 =

  • You can count on to find 13 – 9. Start at 9. Count on until you reach 13.
  • You counted on 4 times.
  • 13 – 9 = 4

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You can also use 10 to find 13 – 9.
Start at 13. Subtract 3 to get to 10. Then subtract 6 more. That way, you subtract 9 in all.

You end at 4.
13 – 9 = 4

🚀Subtract. 17 – 9 =

  • You can count back to find 17 – 9. Start at 17 and count back 9 times.
  • You end at 8.
  • 17 – 9 = 8

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You can also use 10 to find 17 – 9.
Start at 17. Subtract 7 to get to 10. Then subtract 2 more. That way, you subtract 9 in all.

You end at 8.
17 – 9 = 8

Let’s practice!