Numbers to 100: Place Value (Tens and Ones)

Free sample questions, a clear explanation, and 5 practice skills with an AI tutor that guides without giving the answer away.

Building Numbers with Tens and Ones!

Hey, Math Explorer! Have you ever played with building blocks? Imagine you have special block containers that always hold exactly 10 blocks. It makes counting a huge pile of blocks super fast, right? Numbers are just like that!

We can group our numbers into tens (our full containers) and ones (our leftover, single blocks). This is a math superpower called Place Value!

Let's Break Down a Number!

Let's look at the number 42. The number on the left is the boss of the tens, and the number on the right is in charge of the ones.

Tens Place

Ones Place

This means the number 42 is made of:

4 groups of ten (like 4 full block containers)
2 single ones (like 2 leftover blocks)

So, 4 tens and 2 ones make the number forty-two!

Key Takeaway!

The place of a digit tells you its value. A 5 in the tens place (50) is much bigger than a 5 in the ones place (5)!

Does Order Matter? Oh Yes!

Let's be number detectives. Are the numbers 58 and 85 the same? Let's use our building blocks to check!

58 means 5 tens and 8 ones. That's 5 full containers and 8 single blocks.

85 means 8 tens and 5 ones. That's 8 full containers and 5 single blocks!

Wow! 85 has way more blocks because the 8 is in the powerful tens place. Swapping the digits changes the number completely! You are a place value superstar!

Sample questions

1. Look at the picture. How many groups of ten blocks and how many single blocks do you see? What number does it make? (Imagine 3 groups of ten blocks and 4 single blocks)

○ 43

✓ 34

○ 30

○ 4

Answer: 34 — Count the groups of ten first, then count the single ones.

2. If you have 5 bundles of 10 sticks and 2 loose sticks, what number do you have?

○ 25

○ 50

✓ 52

○ 7

Answer: 52 — Remember, 5 tens means 50. Then add the ones.

3. Which number shows 2 tens and 7 ones?

✓ 27

○ 72

○ 20

○ 9

Answer: 27 — How many groups of ten do you see? How many single ones?

Skills in this topic

Count and represent quantities up to 100 using concrete objects grouped into tens and ones.
Identify the number of tens and ones in numbers up to 100 using place value charts.
Read and write numerals up to 100.
Decompose numbers up to 100 into tens and ones (e.g., 42 is 4 tens and 2 ones).
Explain how the number 58 is different from 85, using bundles of ten sticks and single sticks.

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