Counting tens and ones – up to 99

Key notes :

Tens and Ones :

✌Tens:Tens refer to the groupings of ten units. In the decimal system, each group of ten units is represented by a single digit in the tens place of a number.

🏀If a Tenframe is completely filled then it is considered as a ten

Ones :

🏀Ones refer to the individual units that make up numbers. They are represented by digits in the ones place of a number.

🎇 If a Tenframe is not filled then it is considered as ones with respect to the number of frames filled

✔Counting by Tens:

Start with counting by tens (10, 20, 30, …, 90). Emphasize the pattern and how each number increases by ten.

⚽Counting Ones:

If a Tenframe is not filled then it is considered as ones with respect to the number of frames filled

🎄Identifying the Number:

  • After counting all the filled spaces in the ten frame, identify the total number of objects. This number represents the count of ones in that ten frame.

Learn with an example

🎯Count the dots:

Then fill in the missing numbers:

 ______tens + _____ ones = 1

  • Count the tens.
  • There are 0 tens.
  • Count the ones.
  • There is 1 one.
  • Write the tens, then the ones:
  • 0 tens + 1 one = 1

🎯Count the dots:

Then fill in the missing numbers:

 ______tens + _____ ones = 21

  • Count the tens. These are the tens:
  • There are 2 tens.
  • Count the ones.
  • There is 1 one.
  • Write the tens, then the ones:
  • 2 tens + 1 one = 21

🎯Count the dots:

Then fill in the missing numbers:

 ______tens + _____ ones = 3

  • Count the tens.
  • There are 0 tens.
  • Count the ones. These are the ones:
  • There are 3 ones.
  • Write the tens, then the ones:
  • 0 tens + 3 ones = 3

Let’s practice!