Students fix three expanded and word form errors — an incorrect plus-zero term, a misread word form, and a word form that changes the value. Part B has four problems converting between standard, expanded, and word forms. Part C has two questions writing a seven-digit number in both forms and evaluating a peer's expanded form.
Correcting expanded and word form errors — including zero-placeholder mistakes and misread group names — builds the number-representation fluency students need for all multi-digit arithmetic.
Style:
Place Value & Powers of 10
Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1. Fix the sentence:
The expanded form of 450,200 is 400,000 + 50,000 + 200 + 0.
Rewrite: The expanded form of 450,200 is 400,000 + 50,000 + 200. You do not include + 0 for places with no value.
2. Fix the sentence:
Three hundred six thousand forty is written as 360,040.
Rewrite: Three hundred six thousand forty is written as 306,040. The word "six" follows "three hundred," meaning 306 thousands.
3. Fix the sentence:
The word form of 1,080,500 is one million eighty-five hundred.
Rewrite: The word form of 1,080,500 is one million eighty thousand five hundred. "Eighty-five hundred" changes the value.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. Write 700,000 + 40,000 + 3,000 + 90 + 1 in standard form: 743,091.
2. Write 205,060 in expanded form: 200,000 + 5,000 + 60.
3. Write 4,300,000 in word form: four million three hundred thousand.
4. Write nine hundred twelve thousand four hundred five in standard form: 912,405.
Part C: Short Answer
Answer each question in one or two complete sentences.
1. Write the number 6,078,010 in both expanded form and word form.
Expanded form: 6,000,000 + 70,000 + 8,000 + 10. Word form: six million seventy-eight thousand ten.
2. A student wrote the expanded form of 509,300 as 500,000 + 9,000 + 300. Is the student correct? Explain.
Yes, the student is correct. 500,000 + 9,000 + 300 = 509,300. All other place values are zero so they are not included.
Place Value & Powers of 10
★ Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1) Fix the sentence:
The expanded form of 450,200 is 400,000 + 50,000 + 200 + 0.
Rewrite: The expanded form of 450,200 is 400,000 + 50,000 + 200. You do not include + 0 for places with no value.
2) Fix the sentence:
Three hundred six thousand forty is written as 360,040.
Rewrite: Three hundred six thousand forty is written as 306,040. The word "six" follows "three hundred," meaning 306 thousands.
3) Fix the sentence:
The word form of 1,080,500 is one million eighty-five hundred.
Rewrite: The word form of 1,080,500 is one million eighty thousand five hundred. "Eighty-five hundred" changes the value.
★ Part B: Fill in the Blank
Write the missing word or number on each line.
1) Write 700,000 + 40,000 + 3,000 + 90 + 1 in standard form: 743,091.
2) Write 205,060 in expanded form: 200,000 + 5,000 + 60.
3) Write 4,300,000 in word form: four million three hundred thousand.
4) Write nine hundred twelve thousand four hundred five in standard form: 912,405.
★ Part C: Short Answer
Answer each question in one or two complete sentences.
1) Write the number 6,078,010 in both expanded form and word form.
Expanded form: 6,000,000 + 70,000 + 8,000 + 10. Word form: six million seventy-eight thousand ten.
2) A student wrote the expanded form of 509,300 as 500,000 + 9,000 + 300. Is the student correct? Explain.
Yes, the student is correct. 500,000 + 9,000 + 300 = 509,300. All other place values are zero so they are not included.
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9 Questions
15-20 minutes
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