Subtract 3-digit numbers with regrouping
2 printable PDFs, each with its answer key. These sheets practice subtracting one 3-digit number from another when a column runs short and needs regrouping.
Sheet 1
Sheet 2
What's on the sheet
20 problems written in columns, on US Letter paper, with a box for the score. Some from sheet 1:
- 637 − 549 = 88
- 833 − 225 = 608
- 805 − 291 = 514
- 506 − 383 = 123
Helping at home
In 3rd grade, children subtract numbers up to 1,000 in columns. When the top digit in a column is smaller than the one under it, as in the ones of 782 − 663, they take one ten from the tens column and turn it into ten ones. Sometimes they regroup in the tens as well, taking a hundred to make ten tens.
The most common slip is subtracting the smaller digit from the larger one in each column, whichever is on top. For 782 − 663 that gives 121 instead of 119. Another is regrouping but forgetting to cross out and lower the digit they borrowed from.
One way to help at home: before your child starts a problem, ask them to look at the ones. Is the top digit big enough? If not, say the trade out loud: "I take one ten and make it ten ones." Then check an answer by adding it back: 119 + 663 should make 782. Two sheets a week, with the answer key for checking together, is plenty.
Practice the same skill as a game
In larkit, your child plays this skill on screen, with a second try and a hint when a problem is hard. Free to try, no ads.
Play it freeWant more sheets?
The free sheets above need no email. If you'd like extras, we can send them.
Common Core: 3.NBT.A.2