Regrouping is where multiplication gets tricky, and this sheet zeroes in on the carry. Students hunt down errors in 492 x 7 and 1,308 x 5, work out 827 x 9 and 3,105 x 3 on their own, and round 389 to 400 to estimate 389 x 4. They also walk through 364 x 5 step by step and figure out how many books arrive when 24 boxes hold 16 each.
Catching carry mistakes in someone else's work is one of the fastest ways to stop making them yourself, and the estimation problem builds the habit of asking 'is my answer reasonable?'
Style:
Multi-Digit Multiplication
Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1. Fix the sentence:
492 × 7 = 3,344 because 2 × 7 = 14, carry the 1, then 9 × 7 = 63 plus 1 = 64, carry the 6, then 4 × 7 = 28 plus 6 = 34.
Rewrite: 492 × 7 = 3,444 because 2 × 7 = 14, write 4 carry 1, then 9 × 7 = 63 plus 1 = 64, write 4 carry 6, then 4 × 7 = 28 plus 6 = 34.
2. Fix the sentence:
1,308 × 5 = 6,540 because 8 × 5 = 40, carry the 4, then 0 × 5 = 0 plus 4 = 4, then 3 × 5 = 15, carry the 1, then 1 × 5 = 5 plus 1 = 6.
Rewrite: 1,308 × 5 = 6,540 because 8 × 5 = 40, write 0 carry 4, then 0 × 5 = 0 plus 4 = 4, then 3 × 5 = 15 write 5 carry 1, then 1 × 5 = 5 plus 1 = 6.
3. Fix the sentence:
To find 56 × 23 using partial products, compute 56 × 3 = 168 and 56 × 2 = 112, then add 168 + 112 = 280.
Rewrite: To find 56 × 23 using partial products, compute 56 × 3 = 168 and 56 × 20 = 1,120, then add 168 + 1,120 = 1,288.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. 827 × 9 = 7,443
2. 3,105 × 3 = 9,315
3. When you regroup in multiplication, you carry the extra amount to the next place value.
4. To estimate 389 × 4, round 389 to 400 and multiply: 400 × 4 = 1,600
Part C: Short Answer
Answer each question in one or two complete sentences.
1. Explain step by step how to multiply 364 × 5.
Multiply 4 × 5 = 20, write 0 carry 2. Then 6 × 5 = 30 plus 2 = 32, write 2 carry 3. Then 3 × 5 = 15 plus 3 = 18. The answer is 1,820.
2. A bookstore receives 24 boxes of books. Each box holds 16 books. How many books does the store receive?
24 × 16 = 384. The bookstore receives 384 books.
Multi-Digit Multiplication
★ Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1) Fix the sentence:
492 × 7 = 3,344 because 2 × 7 = 14, carry the 1, then 9 × 7 = 63 plus 1 = 64, carry the 6, then 4 × 7 = 28 plus 6 = 34.
Rewrite: 492 × 7 = 3,444 because 2 × 7 = 14, write 4 carry 1, then 9 × 7 = 63 plus 1 = 64, write 4 carry 6, then 4 × 7 = 28 plus 6 = 34.
2) Fix the sentence:
1,308 × 5 = 6,540 because 8 × 5 = 40, carry the 4, then 0 × 5 = 0 plus 4 = 4, then 3 × 5 = 15, carry the 1, then 1 × 5 = 5 plus 1 = 6.
Rewrite: 1,308 × 5 = 6,540 because 8 × 5 = 40, write 0 carry 4, then 0 × 5 = 0 plus 4 = 4, then 3 × 5 = 15 write 5 carry 1, then 1 × 5 = 5 plus 1 = 6.
3) Fix the sentence:
To find 56 × 23 using partial products, compute 56 × 3 = 168 and 56 × 2 = 112, then add 168 + 112 = 280.
Rewrite: To find 56 × 23 using partial products, compute 56 × 3 = 168 and 56 × 20 = 1,120, then add 168 + 1,120 = 1,288.
★ Part B: Fill in the Blank
Write the missing word or number on each line.
1) 827 × 9 = 7,443
2) 3,105 × 3 = 9,315
3) When you regroup in multiplication, you carry the extra amount to the next place value.
4) To estimate 389 × 4, round 389 to 400 and multiply: 400 × 4 = 1,600
★ Part C: Short Answer
Answer each question in one or two complete sentences.
1) Explain step by step how to multiply 364 × 5.
Multiply 4 × 5 = 20, write 0 carry 2. Then 6 × 5 = 30 plus 2 = 32, write 2 carry 3. Then 3 × 5 = 15 plus 3 = 18. The answer is 1,820.
2) A bookstore receives 24 boxes of books. Each box holds 16 books. How many books does the store receive?
24 × 16 = 384. The bookstore receives 384 books.
Ready to Practice?
Complete each section carefully.
9 Questions
15-20 minutes
Auto-graded
Retry anytime
🏆
Questions Correct
0
Correct
0
Incorrect
0
Skipped
0:00
Time
0%
Score
Review Your Answers
See what you got right, missed, or skipped.