Round to the Nearest Ten Word Problems Worksheet - Free Printable

Sure! Let’s solve each problem step by step. The directions say: “Add to find the sum. Round to the nearest ten.”

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Problem 1:

The third grade classes collected coins for a week. Class 1 raised $34.00. Class 2 raised $45.00. And Class 3 raised $76.00. How much did all three classes raise? (Round to the nearest ten.)

✔ Step 1: Add the amounts.
> $34 + $45 + $76 = ?

Let’s add:
- 34 + 45 = 79
- 79 + 76 = 155

✔ Step 2: Round 155 to the nearest ten.

Look at the ones digit: 5 → When it’s 5 or more, we round up.
So, 155 → 160

✔ Answer: $160

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Problem 2:

Benny completed the race in 30.4 minutes. Sarah finished in 41.2 minutes. Paul was done after 55.9 minutes. What was the total of all three races? (Round to the nearest ten.)

✔ Step 1: Add the times.
> 30.4 + 41.2 + 55.9 = ?

Let’s add:
- 30.4 + 41.2 = 71.6
- 71.6 + 55.9 = 127.5

✔ Step 2: Round 127.5 to the nearest ten.

Look at the ones digit: 7 → Since 7 ≥ 5, round up.
127.5 → 130

✔ Answer: 130 minutes

*(Note: Even though it's a decimal, we still round the whole number part — 127.5 is between 120 and 130, closer to 130.)*

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Problem 3:

Carley recorded the amount of commercials shown in a 5 hour TV block. Monday she recorded 75 commercials. Wednesday, there were 37 commercials, and Friday there were 89 commercials. How many commercials were there in all? (Round to the nearest ten.)

✔ Step 1: Add the numbers.
> 75 + 37 + 89 = ?

Let’s add:
- 75 + 37 = 112
- 112 + 89 = 201

✔ Step 2: Round 201 to the nearest ten.

Ones digit is 1 → Less than 5, so round down.
201 → 200

✔ Answer: 200 commercials

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Problem 4:

On our summer trip we travelled 135 miles on day one, 219 miles on day two, and 156 miles on day three. How many miles did we travel altogether? (Round to the nearest ten.)

✔ Step 1: Add the miles.
> 135 + 219 + 156 = ?

Let’s add:
- 135 + 219 = 354
- 354 + 156 = 510

✔ Step 2: Round 510 to the nearest ten.

Ones digit is 0 → Already a multiple of 10 → stays 510

✔ Answer: 510 miles

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Problem 5:

In Science class, we were studying generations of the fruit fly. On day one, 287 new flies were born. On day two, 345 appeared. On day 3, there were 388 more. How many fruit flies were generated in all three days? (Round to the nearest ten.)

✔ Step 1: Add the numbers.
> 287 + 345 + 388 = ?

Let’s add:
- 287 + 345 = 632
- 632 + 388 = 1,020

✔ Step 2: Round 1,020 to the nearest ten.

Ones digit is 0 → Already a multiple of 10 → stays 1,020

✔ Answer: 1,020 fruit flies

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## ✔ Final Answers:

1. $160
2. 130 minutes
3. 200 commercials
4. 510 miles
5. 1,020 fruit flies

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📝 Quick Tip for Rounding to Nearest Ten:

- Look at the ones digit.
- If it’s 0–4, round down.
- If it’s 5–9, round up.
- Replace the ones digit with 0.

Let me know if you’d like to see this as a worksheet answer key! 😊