Multi-Digit Multiplication — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. Grade 5 puzzle: 3?5 times 4 equals 1340. The missing digit is 3.
Dividing 1340 by 4 gives 335, so the missing digit is 3. Grade 5 students confirm by computing 335 times 4, which equals 1340 exactly.
2. If 2?6 times 5 equals 1280, the missing digit is 5.
1280 divided by 5 equals 256, so the unknown digit is 5. Grade 5 learners verify by multiplying 256 by 5 and getting 1280, matching the puzzle.
3. Puzzle: ?47 times 6 equals 2682. The missing hundreds digit is 4.
2682 divided by 6 is 447, so the missing hundreds digit is 4. The full factor 447 times 6 returns 2682, confirming the Grade 5 answer.
4. If 18 times ?2 equals 936, the missing tens digit of the second factor is 5.
936 divided by 18 equals 52, so the missing tens digit is 5. Grade 5 students check by computing 18 times 52 and getting 936, confirming the puzzle.
5. Grade 5 puzzle: 7? times 9 equals 711. The missing ones digit is 9.
711 divided by 9 equals 79, so the missing ones digit is 9. Multiplying 79 by 9 gives 711, matching the puzzle exactly for Grade 5 verification.
6. Grade 5: 4?5 times 6 equals 2670. The missing tens digit is 4.
445 multiplied by 6 yields 2670, confirming the tens digit is 4.
7. Grade 5: 28 times ?5 equals 700. The missing tens digit is 2.
28 multiplied by 25 equals 700, so the missing digit is 2.
8. Grade 5: 12 times 3?0 equals 4080. The missing tens digit is 4.
12 multiplied by 340 equals 4080, confirming the missing digit is 4.
9. Grade 5: ?14 times 5 equals 4070. The missing hundreds digit is 8.
5 multiplied by 814 equals 4070, so the missing hundreds digit is 8.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
3?5 times 4 equals 1340
→ Missing digit 3
Missing digit 3
2?6 times 5 equals 1280
→ Missing digit 5
Missing digit 5
?47 times 6 equals 2682
→ Missing digit 4
Missing digit 4
18 times ?2 equals 936
→ Tens digit 5
Tens digit 5
Each puzzle's missing digit is found by dividing the product by the known factor: 1340 over 4 is 335, 1280 over 5 is 256, 2682 over 6 is 447, and 936 over 18 is 52.