Place Value Tens/Ones

Grade 1 · mathematics · 90 practice problems · read aloud

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🧮 Place Value: Tens and Ones

What is Place Value?

Place value helps us understand what numbers mean. It tells us how many groups of ten and how many single ones a number has. This is super useful because it's the foundation for all of math, helping us add, subtract, and work with bigger numbers later!

How to Find Tens and Ones

  1. Look at the number. For example, let's look at the number 24.
  2. Find the Tens. The first digit (on the left) is the number of tens. The digit '2' means 2 tens, which is the same as 20.
  3. Find the Ones. The second digit (on the right) is the number of ones. The digit '4' means 4 ones.
  4. Put it together: So, 24 means 2 tens and 4 ones.

Let's Look at Examples

Example 1: The number 36

  • The digit '3' is in the tens place. That's 3 tens (30).
  • The digit '6' is in the ones place. That's 6 ones (6).
  • So, 36 is 3 tens and 6 ones.

Example 2: The number 17

  • The digit '1' is in the tens place. That's 1 ten (10).
  • The digit '7' is in the ones place. That's 7 ones (7).
  • So, 17 is 1 ten and 7 ones.

⚠️ Common Mistakes to Avoid

  • Mixing up the places: Remember, the left digit is always the tens, and the right digit is always the ones.
  • Saying the digits separately: For the number 25, don't just say "two-five." Think "2 groups of ten and 5 single ones."

🌟 Tips & Tricks

  • Use objects! Make groups of ten with blocks, beans, or crayons. Whatever is left over is the ones.
  • Think of your fingers: You have 10 fingers—that's one group of ten!
  • Sing a rhyme: "Left is tens, that's a lot! Right is ones, just what I've got!"

How to Practice

You can get great at this!

  • Ask a grown-up to write down numbers. You draw the tens and ones with tallies or circles.
  • Gather small objects like coins or Legos. Bundle them into groups of ten and count what's left.
  • Look at numbers you see every day, like on a calendar or a clock, and say how many tens and ones they have.

Practice problems

6 of the 90, worked through step by step — try them before opening the answer.

1 24 = ? tens + ? ones

Hint: Think about how many groups of ten you can make and how many are left over.

Show the answer

Answer: 2 tens + 4 ones

  1. Understand the place values. In the number 24, the digit "2" is in the tens place, and the digit "4" is in the ones place.
  2. Determine the value of the tens. The digit in the tens place is 2. This means we have 2 groups of ten. Calculation: 2 tens = 2 × 10 = 20.
  3. Determine the value of the ones. The digit in the ones place is 4. This means we have 4 single ones. Calculation: 4 ones = 4 × 1 = 4.
  4. Verify the total. Add the value of the tens and the ones together to make sure it equals the original number. 20 (from the tens) + 4 (from the ones) = 24. This matches the original number, so our breakdown is correct. Final Answer: 2 tens + 4 ones

Step-by-step solution: We are given the number 24 and need to break it into tens and ones.

2 42 = ? tens + ? ones

Hint: Think about how many groups of ten are in the number and how many are left over.

Show the answer

Answer: 4 tens + 2 ones

  1. Understand the place values. In the number 42, the digit "4" is in the tens place, and the digit "2" is in the ones place.
  2. Determine how many tens. The tens place tells us how many groups of ten we have. 4 in the tens place means 4 × 10 = 40.
  3. Determine how many ones. The ones place tells us how many single units we have beyond the tens. 2 in the ones place means 2 × 1 = 2.
  4. Check the total. 40 (from the tens) + 2 (from the ones) = 42. This matches the original number.
  5. Write the answer in the requested form. So, 42 = 4 tens + 2 ones. Final answer: 4 tens + 2 ones

Let's break down the number 42 into tens and ones.

3 37 = ? tens + ? ones

Hint: Look at each digit in the number and think about what place it is in

Show the answer

Answer: 3 tens 7 ones

  1. Look at the number 37
  2. The digit 3 is in the tens place, so that means 3 tens
  3. The digit 7 is in the ones place, so that means 7 ones
  4. Put them together: 3 tens + 7 ones

The answer is 3 tens and 7 ones.

4 34 = ? tens + ? ones

Hint: Look at each digit in the number. The first digit tells you how many groups of ten, and the second digit tells you how many single ones.

Show the answer

Answer: 3 tens + 4 ones

  1. Look at the number 34.
  2. The digit '3' is in the tens place. This means there are 3 groups of ten.
  3. The digit '4' is in the ones place. This means there are 4 single ones.
  4. Therefore, 34 is the same as 3 tens and 4 ones.

The answer is 3 tens + 4 ones.

5 57 = ? tens + ? ones

Hint: Look at each digit in the number. The first digit tells you how many groups of ten, and the second digit tells you how many single ones.

Show the answer

Answer: 5 tens + 7 ones

  1. Look at the number 57.
  2. The digit 5 is in the tens place. This means there are 5 groups of ten. 5 tens = 50.
  3. The digit 7 is in the ones place. This means there are 7 single ones. 7 ones = 7.
  4. Putting it together: 57 is made of 5 tens and 7 ones.

The answer is 5 tens + 7 ones.

6 How many tens in 29?

Hint: Look at the first digit of the two-digit number to find how many groups of ten it contains.

Show the answer

Answer: 2

  1. The number 29 is a two-digit number.
  2. The digit in the tens place is 2.
  3. This means there are 2 groups of ten in the number 29.

The answer is 2.

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