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📐 Detailed Explanation of Rounding to the Nearest Ten

When we round to the nearest ten, we change a number to the closest multiple of ten. This helps us make numbers easier to work with, especially when we estimate or check answers.

🔍 What to Look At When Rounding to the Nearest Ten

First, find the digit in the tens place and the digit in the ones place.

  • The tens place is the second digit from the right.
  • The ones place is the very last digit on the right.

For example, in the number 43:

  • The tens place is 4.
  • The ones place is 3.

📏 The Rules for Rounding Up or Down

Look at the ones place:

  • If the ones digit is 0, 1, 2, 3, or 4, round down by keeping the tens digit the same and changing the ones digit to 0.
  • If the ones digit is 5, 6, 7, 8, or 9, round up by adding 1 to the tens digit and changing the ones digit to 0.

📝 Step-by-Step Examples

Example 1: Round 23 to the nearest ten.

  1. Look at the tens digit (2) and the ones digit (3).
  2. The ones digit is 3, which is less than 5.
  3. So, round down. Keep the tens digit 2 the same.
  4. Change the ones digit to 0.
  5. The rounded number is 20.

Example 2: Round 57 to the nearest ten.

  1. Look at the tens digit (5) and the ones digit (7).
  2. The ones digit is 7, which is 5 or more.
  3. So, round up. Add 1 to the tens digit (5 + 1 = 6).
  4. Change the ones digit to 0.
  5. The rounded number is 60.

Example 3: Round 40 to the nearest ten.

  1. Look at the tens digit (4) and the ones digit (0).
  2. The ones digit is 0, so round down keep tens the same.
  3. The rounded number is 40.

📚 Summary

  • Check the tens and ones digits.
  • If the ones digit is less than 5, round down.
  • If the ones digit is 5 or more, round up.
  • Remember to always end with a zero in the ones place.

Try practising rounding numbers like 31, 46, and 84 to get better! 🎯

📝 20 Examination-Style Questions on Rounding to the Nearest Ten for Year 3 Maths

Here are 20 questions to help you practise rounding numbers to the nearest ten. These questions use different formats like multiple-choice, fill in the blanks, and short answers. Let’s get started and have fun rounding! 🎉

❓ Multiple-Choice Questions

  1. Round 43 to the nearest ten.
    a) 40
    b) 45
    c) 50
  2. What is 77 rounded to the nearest ten?
    a) 70
    b) 75
    c) 80
  3. Round 24 to the nearest ten.
    a) 20
    b) 25
    c) 30
  4. Which number is 56 closest to when rounded to the nearest ten?
    a) 50
    b) 60
    c) 55
  5. Round 88 to the nearest ten.
    a) 80
    b) 85
    c) 90

📝 Fill in the Blank Questions

  1. 31 rounds to ________ when rounded to the nearest ten.
  2. When you round 69 to the nearest ten, you get ________.
  3. ________ is 42 rounded to the nearest ten.
  4. The number 54 rounded to the nearest ten is ________.
  5. Round 79 to the nearest ten. The answer is ________.

✍️ Short Answer Questions

  1. Round 15 to the nearest ten.
  2. What does 68 round to?
  3. If you round 33 to the nearest ten, what number do you get?
  4. Round 95 to the nearest ten.
  5. What is 22 rounded to the nearest ten?

🔀 Mixed Format Questions

  1. Circle the number that 48 rounds to: 40 or 50?
  2. Fill in the blank: 84 rounds to ________ when rounded to the nearest ten.
  3. Choose the correct answer: What is 59 rounded to the nearest ten?
    a) 50
    b) 60
    c) 55
  4. Write the number rounded to the nearest ten: 27
  5. Multiple Choice: Which number does 63 round to?
    a) 60
    b) 70
    c) 65

Use these questions to practise rounding to the nearest ten and check your answers carefully. Remember, numbers 1 to 4 round down to the closest ten, and numbers 5 to 9 round up! Keep practising and you will get better every time. 💪

✅ Answers to the Examination-Style Questions on Rounding to the Nearest Ten

Here are the answers to the 20 examination-style questions on rounding to the nearest ten, with clear explanations to help you understand the correct rounding process. 📊

1. Round 34 to the nearest ten.

Answer: 30
Explanation: The number 34 is closer to 30 than 40 because the ones digit (4) is less than 5, so we round down to 30.

2. Round 57 to the nearest ten.

Answer: 60
Explanation: The ones digit is 7, which is 5 or more, so we round up from 57 to 60.

3. Round 82 to the nearest ten.

Answer: 80
Explanation: The ones digit is 2, less than 5, so round down to 80.

4. Round 95 to the nearest ten.

Answer: 100
Explanation: The ones digit is 5, so we round up to 100.

5. Round 29 to the nearest ten.

Answer: 30
Explanation: The ones digit is 9, which is 5 or more, so round up from 29 to 30.

6. Round 40 to the nearest ten.

Answer: 40
Explanation: The ones digit is 0, so the number stays the same, 40.

7. Round 73 to the nearest ten.

Answer: 70
Explanation: The ones digit is 3, less than 5, so round down to 70.

8. Round 68 to the nearest ten.

Answer: 70
Explanation: The ones digit is 8, which is 5 or more, so round up to 70.

9. Round 10 to the nearest ten.

Answer: 10
Explanation: The ones digit is 0, so round stays at 10.

10. Round 44 to the nearest ten.

Answer: 40
Explanation: The ones digit is 4, less than 5, so round down to 40.

11. Round 50 to the nearest ten.

Answer: 50
Explanation: The ones digit is 0, so the number stays at 50.

12. Round 85 to the nearest ten.

Answer: 90
Explanation: The ones digit is 5, so round up to 90.

13. Round 31 to the nearest ten.

Answer: 30
Explanation: The ones digit is 1, less than 5, so round down to 30.

14. Round 99 to the nearest ten.

Answer: 100
Explanation: The ones digit is 9, which is 5 or more, so round up to 100.

15. Round 62 to the nearest ten.

Answer: 60
Explanation: The ones digit is 2, less than 5, so round down to 60.

16. Round 84 to the nearest ten.

Answer: 80
Explanation: The ones digit is 4, less than 5, so round down to 80.

17. Round 100 to the nearest ten.

Answer: 100
Explanation: The ones digit is 0, so the number stays at 100.

18. Round 55 to the nearest ten.

Answer: 60
Explanation: The ones digit is 5, so round up to 60.

19. Round 26 to the nearest ten.

Answer: 30
Explanation: The ones digit is 6, which is 5 or more, so round up to 30.

20. Round 77 to the nearest ten.

Answer: 80
Explanation: The ones digit is 7, 5 or more, so round up to 80.

💡 Helpful Study Tips:

  • Look at the digit in the ones place to decide: if it’s 5 or more, round the tens digit up by one.
  • If the ones digit is less than 5, keep the tens digit the same and change the ones digit to zero.
  • Practise by rounding numbers around you, like your shoe size or the number of steps to school!

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