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Rounding Decimals to 999
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Rounding Decimals to 999
📚 Part 1: Vocabulary and Multiple Choice
1. What does "rounding" mean?
Making a number exact
Changing a number to the nearest place value
Adding decimal places
Subtracting from a number
2. Round 45.67 to the nearest whole number.
45
46
45.7
50
3. Round 123.456 to the nearest tenth.
123.4
123.5
123.46
124
4. Which digit do you look at to round 678.925 to the nearest hundredth?
The 9 (tenths place)
The 2 (hundredths place)
The 5 (thousandths place)
The 8 (ones place)
✏️ Part 2: Practice Problems
5. Round each decimal to the nearest whole number:
a) 234.78 = _______
b) 567.23 = _______
c) 89.91 = _______
6. Round each decimal to the nearest tenth:
a) 145.67 = _______
b) 298.84 = _______
c) 456.15 = _______
7. Round each decimal to the nearest hundredth:
a) 123.456 = _______
b) 789.234 = _______
c) 345.678 = _______
🎯 Part 3: Problem Solving
8. A baseball player's batting average is 0.3456. Round this to the nearest hundredth.
9. The distance between two cities is 234.789 miles. Round this distance to the nearest tenth of a mile.
10. Extension: Explain in your own words when you would round UP and when you would round DOWN. Give an example of each.
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