Understanding Place Value Worksheets
These worksheets are exactly what they sound like. A number appears on the page, one digit is underlined, and the student writes down what that digit is worth based on its position. Hundreds place, tens place, ones place — that kind of thing. They show up everywhere in third-grade math and fourth-grade review packets. If you are looking for answer keys, there are some straightforward ways to find them without spending money. The actual answers are just the expanded value of each underlined digit. If the number is 4,732 and the seven is underlined, the answer is 700. If the four is underlined, the answer is 4,000. That is the entire concept. The worksheet format is designed to drill place value recognition, which is foundational before moving into rounding, addition with regrouping, and eventually decimals. I have seen teachers skip this worksheet entirely and go straight into multi-digit operations, and it always comes back to bite them a few weeks later when kids do not understand why a digit in the tens column is worth ten times more than the same digit in the ones column. When I was grading these, the most common mistake was writing the digit itself instead of its full value. A kid would see the underlined three in 5,318 and write 3 instead of 300. You can catch this by checking if the answer makes sense in context. The answer should always be larger than or equal to the digit, and it should end in enough zeros to match the place. Another edge case I ran into was worksheets that included zeros in the middle of a number, like 6,042 with the four underlined. Some answer keys mistakenly treat the zero as if it shifts the four into the tens place when it is already there, but the real question is whether the student recognizes that the zero holds the hundreds place and does not change the four's value. The answer is still 40, regardless of what sits to the left of it.
Where to Find These Worksheets and Keys
There are a few reliable sources. Teachers Pay Teachers has dozens of free and cheap versions with answer keys bundled in. K12reader and Super Teacher Worksheets both host printable PDFs. Math-Aids.com generates custom worksheets where you can specify the number of digits and whether decimals are included, and it auto-generates an answer sheet at the bottom of the page. That last option is probably the most practical because you can control the difficulty level and get exactly the format you need without scrolling through pages of ads or clicking through paywalls. If you need answers for a specific published worksheet from a textbook publisher like Pearson or Holt McDougal, those are usually available through the publisher's teacher resource portal, which requires a school email or ISBN lookup. Open-ended online searches for the worksheet title plus "answer key" will surface the right pages, but the results are inconsistent and sometimes broken. The publisher portals are more reliable if you have access.
How to Create Your Own
You do not need a fancy tool. A simple spreadsheet will do. Put a five-digit number in column A, randomly underline one digit in column B using a text description, and use a formula in column C to calculate the place value. The formula breaks down the digit's position and multiplies it by the appropriate power of ten. It takes about ten minutes to set up, and then you can generate hundreds of unique problems instantly. I use this method when the printable worksheets start looking too repetitive and the students lose focus. Variety keeps them engaged without adding real work on your end. The biggest issue is that these worksheets often use numbers that are too uniform. Every problem has the underlined digit in the same place across twenty questions. That does not build actual fluency. A better version randomizes the position of the underlined digit so the student cannot just memorize a pattern. Another problem is the inclusion of trailing zeros at the end of numbers, which confuses some learners into thinking the zero itself has a place value to report. The zero's value is zero, and stating that explicitly helps clarify the concept rather than obscure it. There is also the matter of decimal place value, which some worksheets ignore entirely. Once students move past whole numbers, the same logic applies but with decimal places — the underlined digit in 3.47 might represent 4 tenths or 0.4. Make sure the worksheet you are using covers both, or add a second section yourself. The transition from whole number place value to decimal place value is smoother when the student has already practiced the same skill in both contexts.
Get the Full Details
If you are a parent helping a child with this, the fastest way to check answers is to verify that each response equals the underlined digit multiplied by the correct place value. One minute per problem if you know the math. Five minutes if you are still getting the place values straight.
