Counting tens and ones – up to 30

Counting tens and ones – up to 30 by Delta publications

Key notes :

🔢 Understanding Tens and Ones

  • Numbers are made up of tens and ones.
  • 💡 Tens are groups of 10.
  • 💡 Ones are single units.
    👉 Example:
    12 = 1 ten + 2 ones (10 + 2)

🧮 Counting with Bundles and Singles

📦 Each bundle of 10 sticks = 1 ten.

🪵 Single sticks represent ones.
👉 Example:

  • 1 bundle + 3 sticks = 13
  • 2 bundles + 5 sticks = 25

🌈 Writing Numbers Using Tens and Ones

NumberTensOnesExpanded Form
101010 + 0
151510 + 5
202020 + 0
272720 + 7
303030 + 0

🧠 Place Value Helps Us Read Numbers

🏠 Tens place comes first (left side).

🍭 Ones place comes next (right side).
👉 Example:
In 24,

  • 2 is in the tens place (means 20)
  • 4 is in the ones place (means 4)

🎲 Counting by Tens

Skip count by 10s to reach 30 easily:
👉 10, 20, 30 🎉

  • 1 ten = 10
  • 2 tens = 20
  • 3 tens = 30

🍎 Visual Example

🧺 10 apples = 🍏🍏🍏🍏🍏🍏🍏🍏🍏🍏 = 1 ten
🧺 + 3 apples more = 🍏🍏🍏 = 3 ones
✅ Total = 13 apples = 1 ten 3 ones

🧩 Practice Tip

👉 Break numbers to see tens and ones:

  • 18 = 10 + 8
  • 22 = 20 + 2
  • 29 = 20 + 9

🏆 Fun Fact

Every time you add 10 ones, they make 1 ten! 💫

Learn with an example

✈️Count the dots:

Then fill in the missing numbers:

______ tens +______ ones =19

  • Count the tens.
  • There is 1 ten.
  • Count the ones. These are the ones:
  • There are 9 ones.
  • Write the tens, then the ones:
  • 1 ten + 9 ones = 19

✈️Count the dots:

Then fill in the missing numbers:

______ tens +______ ones =20

  • Count the tens. These are the tens:
  • There are 2 tens.
  • Count the ones.
  • There are 0 ones.
  • Write the tens, then the ones:
  • 2 tens + 0 ones = 20

Let’s practice!