Place Value and Rounding — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. 18,735 rounded to the nearest hundred is 18,700
The tens digit is 3, which is less than 5, so the hundreds digit stays at 7 and 18,735 rounds down to 18,700.
2. 654,920 rounded to the nearest ten-thousand is 650,000
The thousands digit is 4, which is less than 5, so the ten-thousands digit stays at 5 and 654,920 rounds down to 650,000.
3. 2,385,000 rounded to the nearest million is 2,000,000
The hundred-thousands digit is 3, which is less than 5, so 2,385,000 rounds down to 2,000,000.
4. The value of the digit 3 in 4,302,815 is 300,000
The digit 3 is in the hundred-thousands place, so its value is 3 x 100,000 = 300,000.
5. 91,465 rounded to the nearest thousand is 91,000
The hundreds digit is 4, which is less than 5, so the thousands digit stays at 1 and 91,465 rounds down to 91,000.
6. In 5,078,246, the digit 7 is in the ten-thousands place.
Counting from the right, the ten-thousands place is the fifth position. In 5,078,246, the digit 7 occupies that spot with a value of 70,000.
7. 347,850 rounded to the nearest hundred-thousand is 300,000
The ten-thousands digit is 4, which is less than 5, so 347,850 rounds down to 300,000.
8. 5,672 rounded to the nearest ten is 5,670
The ones digit is 2, which is less than 5, so the tens digit stays at 7 and 5,672 rounds down to 5,670.
9. 1,750,000 rounded to the nearest million is 2,000,000
The hundred-thousands digit is 7, which is 5 or greater, so the millions digit rounds up from 1 to 2, giving 2,000,000.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
Digit 8 in 2,830,000
→ 800,000
500
Digit 5 in 6,500
→ 500
6,000
Digit 4 in 143,090
→ 40,000
800,000
Digit 6 in 9,006,712
→ 6,000
40,000
Correct matches: Digit 8 in 2,830,000 → 800,000; Digit 5 in 6,500 → 500; Digit 4 in 143,090 → 40,000; Digit 6 in 9,006,712 → 6,000.