Place Value & Powers of 10 — Answer Key
Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1. Fix the sentence:
In 4,536,271 the digit 3 is in the hundred-thousands place.
Corrected: In 4,536,271 the digit 3 is in the ten-thousands place, not the hundred-thousands place.
The corrected sentence is: "In 4,536,271 the digit 3 is in the ten-thousands place, not the hundred-thousands place.". The original sentence "In 4,536,271 the digit 3 is in the hundred-thousands place." contained an error that needed to be fixed.
2. Fix the sentence:
The value of the 7 in 870,432 is 7,000.
Corrected: The value of the 7 in 870,432 is 70,000 because the 7 is in the ten-thousands place.
The corrected sentence is: "The value of the 7 in 870,432 is 70,000 because the 7 is in the ten-thousands place.". The original sentence "The value of the 7 in 870,432 is 7,000." contained an error that needed to be fixed.
3. Fix the sentence:
In 2,915,680 the digit in the millions place is 9.
Corrected: In 2,915,680 the digit in the millions place is 2. The 9 is in the hundred-thousands place.
The corrected sentence is: "In 2,915,680 the digit in the millions place is 2. The 9 is in the hundred-thousands place.". The original sentence "In 2,915,680 the digit in the millions place is 9." contained an error that needed to be fixed.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. In 6,482,305 the digit 4 is in the hundred-thousands place.
The correct answer is 'hundred-thousands'. In 6,482,305 the digit 4 is in the hundred-thousands place.
2. The value of the 8 in 385,120 is 80,000.
The correct answer is '80,000'. The value of the 8 in 385,120 is 80,000.
3. In 1,209,754 the digit in the ten-thousands place is 0.
The correct answer is '0'. In 1,209,754 the digit in the ten-thousands place is 0.
4. 5,000,000 + 30,000 + 200 + 7 in standard form is 5,030,207.
The correct answer is '5,030,207'. 5,000,000 + 30,000 + 200 + 7 in standard form is 5,030,207.
Part C: Short Answer
Answer each question in one or two complete sentences.
1. What is the value of the digit 6 in 2,645,000? Explain how you know.
Sample answer: The 6 is in the hundred-thousands place, so its value is 600,000.
A good answer is: "The 6 is in the hundred-thousands place, so its value is 600,000.". Use complete sentences and include details from what you learned.
2. A number has a 9 in the millions place and a 3 in the ten-thousands place. All other digits are 0. What is the number?
Sample answer: The number is 9,030,000.
A good answer is: "The number is 9,030,000.". Use complete sentences and include details from what you learned.