Understanding Tens and Ones

Foundational

Before adding two-digit numbers, it's crucial to understand place value. This stack introduces the concept of 'tens' and 'ones' which are the building blocks of double-digit numbers.

Understanding Tens and Ones

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What do we call the two positions in a two-digit number?

They are called the 'tens' place (on the left) and the 'ones' place (on the right).

In the number $47$, which digit is in the tens place?

The digit $4$ is in the tens place.

In the number $47$, what is the value of the digit in the tens place?

The value of the $4$ is $40$ (four tens).

In the number $63$, which digit is in the ones place?

The digit $3$ is in the ones place.

In the number $63$, what is the value of the digit in the ones place?

The value of the $3$ is $3$ (three ones).

How would you write the number that has $5$ tens and $2$ ones?

$$ 52 $$

How would you write the number that has $8$ tens and $0$ ones?

$$ 80 $$

How many ones are there in one ten?

There are $10$ ones in one ten.

Look at the number $28$. How many tens and how many ones does it have?

It has $2$ tens and $8$ ones.

Base ten blocks displaying one red rod of ten and four blue unit cubes, illustrating the place value concept of tens and ones to represent the number 14.

What does this image show?

This image shows base ten blocks. The long rods represent 'tens' and the small single cubes represent 'ones'. They help us visualize numbers.

Using base ten blocks, how would you represent the number $34$?

Base ten block representation of the number 34, showing three red ten-rods for the tens place and a stack of four blue one-cubes for the ones place.

You would use $3$ ten-rods and $4$ one-cubes.

Two red ten-rods alongside a column of eight blue unit cubes, visually representing place value components that make up the number twenty-eight.

What number is represented by $2$ ten-rods and $8$ one-cubes?

The number $28$.

Using base ten blocks, how would you represent the number $72$?

Seven red ten-rods and two stacked blue unit cubes, visually representing the number 72 using base ten blocks.

You would use $7$ ten-rods and $2$ one-cubes.

Understanding Tens and Ones

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