Real-World Examples of Rounding Decimals to Whole Numbers Grade 5

📚 Quick Study Guide

• 🔍 To round a decimal to the nearest whole number, look at the digit in the tenths place (the first digit after the decimal point).
• 🔢 If the digit in the tenths place is 5 or greater, round the whole number up. For example, 3.5 rounds up to 4.
• 💡 If the digit in the tenths place is less than 5, round the whole number down. For example, 7.2 rounds down to 7.
• 📝 Remember, rounding means finding a number that is close to the exact number, but easier to work with.
• 💸 Rounding is very useful when estimating costs. If something costs $4.85, we can round it to $5 to quickly see if we have enough money.
• ⏱️ Rounding is also helpful for estimating time. If a task takes 2.3 hours, we can say it takes about 2 hours.

Practice Quiz

1. What is 6.7 rounded to the nearest whole number?
   1. 6
   2. 7
   3. 6.5
   4. 6.8
2. A bag of chips costs $2.49. Rounded to the nearest dollar, about how much does it cost?
   1. $2
   2. $2.50
   3. $3
   4. $2.40
3. What is 12.3 rounded to the nearest whole number?
   1. 12
   2. 13
   3. 12.5
   4. 12.0
4. A race car completed a lap in 35.8 seconds. Rounded to the nearest whole number, how many seconds did it take?
   1. 35
   2. 36
   3. 35.5
   4. 35.9
5. What is 9.1 rounded to the nearest whole number?
   1. 10
   2. 9
   3. 9.5
   4. 9.0
6. Sarah ran 5.6 miles. Rounded to the nearest whole number, about how many miles did she run?
   1. 5
   2. 6
   3. 5.5
   4. 5.7
7. What is 0.4 rounded to the nearest whole number?
   1. 1
   2. 0
   3. 0.5
   4. 0.0