Students fix three more regrouping errors — 672 × 5 = 3,260, 2,143 × 3 = 6,329, and 509 × 8 = 4,062. Part B has three fill-in-the-blank problems: 1,325 × 4, 847 × 6, and 2,006 × 3. Part C has two short-answer questions about why place value alignment matters and a school pencil-order problem.
Four-digit multiplications and zeros in the multiplicand are the two trickiest cases at this level — both appear in this sheet.
Style:
Multi-Digit Multiplication
Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1. Fix the sentence:
672 × 5 = 3,260 because 2 × 5 = 10, carry the 1, then 7 × 5 = 35 plus 1 = 36, carry the 3, then 6 × 5 = 30 plus 3 = 33.
Rewrite: 672 × 5 = 3,360 because 2 × 5 = 10, write 0 carry 1, then 7 × 5 = 35 plus 1 = 36, write 6 carry 3, then 6 × 5 = 30 plus 3 = 33.
2. Fix the sentence:
2,143 × 3 = 6,329 because 3 × 3 = 9, 4 × 3 = 12, carry the 1, 1 × 3 = 3 plus 1 = 4, 2 × 3 = 6.
Rewrite: 2,143 × 3 = 6,429 because 3 × 3 = 9, 4 × 3 = 12 write 2 carry 1, 1 × 3 = 3 plus 1 = 4, 2 × 3 = 6.
3. Fix the sentence:
509 × 8 = 4,062 because 9 × 8 = 72, carry the 7, then 0 × 8 = 0 plus 7 = 7, then 5 × 8 = 40.
Rewrite: 509 × 8 = 4,072 because 9 × 8 = 72, write 2 carry 7, then 0 × 8 = 0 plus 7 = 7, then 5 × 8 = 40.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. 1,325 × 4 = 5,300
2. 847 × 6 = 5,082
3. 2,006 × 3 = 6,018
4. When multiplying a number by 0, the product is always zero.
Part C: Short Answer
Answer each question in one or two complete sentences.
1. Why is it important to line up digits by place value when multiplying?
Lining up digits by place value keeps ones, tens, hundreds, and thousands in the correct columns so carried numbers are added to the right place.
2. A school orders 1,250 pencils for each of 4 classrooms. How many pencils are ordered in total?
1,250 × 4 = 5,000. The school orders 5,000 pencils in total.
Multi-Digit Multiplication
★ Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1) Fix the sentence:
672 × 5 = 3,260 because 2 × 5 = 10, carry the 1, then 7 × 5 = 35 plus 1 = 36, carry the 3, then 6 × 5 = 30 plus 3 = 33.
Rewrite: 672 × 5 = 3,360 because 2 × 5 = 10, write 0 carry 1, then 7 × 5 = 35 plus 1 = 36, write 6 carry 3, then 6 × 5 = 30 plus 3 = 33.
2) Fix the sentence:
2,143 × 3 = 6,329 because 3 × 3 = 9, 4 × 3 = 12, carry the 1, 1 × 3 = 3 plus 1 = 4, 2 × 3 = 6.
Rewrite: 2,143 × 3 = 6,429 because 3 × 3 = 9, 4 × 3 = 12 write 2 carry 1, 1 × 3 = 3 plus 1 = 4, 2 × 3 = 6.
3) Fix the sentence:
509 × 8 = 4,062 because 9 × 8 = 72, carry the 7, then 0 × 8 = 0 plus 7 = 7, then 5 × 8 = 40.
Rewrite: 509 × 8 = 4,072 because 9 × 8 = 72, write 2 carry 7, then 0 × 8 = 0 plus 7 = 7, then 5 × 8 = 40.
★ Part B: Fill in the Blank
Write the missing word or number on each line.
1) 1,325 × 4 = 5,300
2) 847 × 6 = 5,082
3) 2,006 × 3 = 6,018
4) When multiplying a number by 0, the product is always zero.
★ Part C: Short Answer
Answer each question in one or two complete sentences.
1) Why is it important to line up digits by place value when multiplying?
Lining up digits by place value keeps ones, tens, hundreds, and thousands in the correct columns so carried numbers are added to the right place.
2) A school orders 1,250 pencils for each of 4 classrooms. How many pencils are ordered in total?
1,250 × 4 = 5,000. The school orders 5,000 pencils in total.
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