Rounding to the Nearest 10 and 100: Games & Tricks
Rounding makes numbers easier to work with. To round to the nearest 10, look at the ones digit: 0 to 4 rounds down, 5 to 9 rounds up. So 43 rounds to 40 and 47 rounds to 50.
🎯 Play the rounding to 10 and 100 game 🖨️ Printable worksheet
Tricks that make it easier
- Look only at the digit to the right of the place you are rounding to.
- 5 or more, round up; 4 or less, round down.
- Picture a number line: which ten is the number closer to?
Try these
- 18 → nearest 10 =
Answer
20 - 93 → nearest 10 =
Answer
90 - 67 → nearest 10 =
Answer
70 - 51 → nearest 10 =
Answer
50 - 64 → nearest 10 =
Answer
60 - 47 → nearest 10 =
Answer
50
Common mistakes
- Looking at the wrong digit.
- Rounding 45 down to 40 (5 rounds up).
- Changing digits that should stay the same, like rounding 348 to 400 when asked for the nearest 10.
A five-day practice plan
| Day | What to do (10 minutes) |
|---|---|
| Day 1 | Play Rounding Rally on this skill for 5–10 minutes. Read the explanation after every mistake. |
| Day 2 | Learn one trick from this page and use it out loud while you play. |
| Day 3 | Print the worksheet and try it without help. Mark it with the answer key together. |
| Day 4 | Play again and try to beat your personal best score or get three stars. |
| Day 5 | Mix it up: try the ⏱️ Timed test, or ask your child to explain the skill to you in their own words. |
Suits Grade 3 and Grade 4.
Frequently asked questions
How do you round to the nearest 10?
Look at the ones digit. If it is 5 or more, round up; if it is 4 or less, round down.
What is 65 rounded to the nearest 10?
70, because 5 rounds up.
What is 349 rounded to the nearest 100?
300, because the tens digit is 4.