10 or 100 More or Less · seed 1 · A4, ink-friendly. The answer key prints on its own page for grown-ups.

10 or 100 More or Less

Mathematics · Number Representation & Place Value · ages 7-8
Name ______________________   Date ____________

  1. What is 100 less than 836?

    Answer: ______________

  2. What is 10 more than 354?

    • 344
    • 364
    • 355
    • 353

  3. What is 10 more than 342?

    • 343
    • 352
    • 442

  4. For a three-digit number, adding 10 changes the ones digit.

    Circle one:   True   False

  5. What is 100 more than 716?

    Answer: ______________

  6. Type the number that is 10 more than 618.

    600610620630640+10

    Answer: ______________

  7. To find 100 more than 475, which digit changes?

    • The hundreds digit
    • The tens digit
    • The ones digit
    • Every digit

  8. Mia says that to find 10 more than 437 you only change the tens digit. Is Mia right?

    Circle one:   True   False

  9. Priya gets 558 for 100 more than 458, but she says the tens digit changed to get it. What really changed?

    • The hundreds digit changed from 4 to 5
    • The tens digit changed from 5 to 6
    • The ones digit changed from 8 to 9

  10. Which rule finds 100 less than any three-digit number?

    • Subtract 1 from the tens digit
    • Subtract 1 from the hundreds digit
    • Subtract 10 from the number
    • Subtract 1 from every digit
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Answer key

For grown-ups. Fold this page away before handing over the rest.

10 or 100 More or Less W1-mt_izien3ZX51-s1

  1. 736 · Taking 100 lowers the hundreds digit from 8 to 7, giving 736.
  2. 364 · Adding 10 raises the tens digit from 5 to 6, giving 364.
  3. 352 · Only the tens digit changes: 4 becomes 5, so 342 becomes 352.
  4. False · Adding 10 changes the tens digit. The ones digit stays exactly the same.
  5. 816 · Adding 100 raises the 7 hundreds to 8 hundreds, giving 816.
  6. 628 · The tens digit moves from 1 to 2, so 618 becomes 628.
  7. The hundreds digit · Adding 100 adds 1 hundred, so the hundreds digit 4 grows to 5 and 475 becomes 575.
  8. True · Mia is right: 437 + 10 = 447, and only the 3 tens become 4 tens.
  9. The hundreds digit changed from 4 to 5 · 558 is the right answer, but the hundreds digit is what changed, from 4 to 5. The tens and ones digits stayed the same.
  10. Subtract 1 from the hundreds digit · Taking away 100 means taking away 1 hundred, so the hundreds digit drops by 1.
Worksheet · LightMySky