Students will
Learning objectives
- Subtract three-digit numbers with a trade from the tens or the hundreds.
- Regroup across zeros, as in 700 − 286.
- Record each trade above the top number.
- Check a subtraction answer by adding.
Subtraction with Regrouping Worksheet
Students subtract three-digit numbers needing a trade from the tens, from the hundreds or across a zero, and check with addition.
Format
- Colour PDFThe full-colour resource, ready to print or projectAvailable
- PrintablePrinter-friendly, uses less inkAvailable
- Fillable PDFStudents type answers right into the fileAvailable
- Google ClassroomAssign and share digitallyComing soon
Only the colour PDF is ready for this resource so far. The other formats are on the way.
At a glance
- Years
- 2–3
- Pages
- 2
- A4
- Type
- Worksheet
- Includes
- Answer key
Last updated
Page 1 of 2
Three-digit subtraction with regrouping
Students subtract three-digit numbers that need regrouping, after a worked example takes 524 − 268 through a hundreds, tens and ones frame with both trades marked. The nine problems get harder by row: a trade from the tens, then from the hundreds, then zeros to trade across, as in 403 − 157 and 700 − 286, where students regroup twice before they can take away the ones. A robotics club story, 605 − 368, also crosses a zero. Students show each trade above the top number.
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From the creator
Teaching tips
1
The key flags the most common slip: taking the smaller digit from the bigger one in every column, so 463 − 128 becomes 345. Have students ask "Is the top digit big enough?" before each column.
2
For the zero row, have students rewrite the top number before subtracting anything: 700 becomes 6 hundreds, 9 tens and 10 ones. Trading only once leaves an empty tens column, which is where students get stuck.
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Skills covered
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Differentiation
Meet every learner.
Ways to adjust the ten problems for different students.
Support
One kind of trade at a time
- Do only the first row on day one, making each trade with base-ten blocks.
- Redo 524 − 268 together, then work problem 1 as a second example.
- Hold the zero row until the first two rows are right.
On level
Teach as written
- The whole page, rows in order.
- Students use the Check it box, then check two more answers the same way.
Extension
Explain the trades
- Write one new problem for each row and swap with a partner.
- Explain in words why 805 becomes 7 hundreds, 9 tens and 15 ones.
- Solve the story problem a second way, counting up from 368 to 605.
Curriculum alignment.
Each one is checked against the official document. Where the resource covers only part of a standard, the note says so.
Australian Curriculum: Mathematics · Year 3
AC9M3N03Subtract three-digit numbers by regrouping
Students subtract three-digit numbers in columns, trading a ten or a hundred (including across a zero), and solve one story problem; it covers written subtraction only, not addition or other ways to split up numbers.
AC9M3A01Addition undoes subtraction
Students check a subtraction answer by adding it back to get the starting number; it is one check item, and finding unknown values is not practised.
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