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Riddle puzzle: Multi-digit multiplication

Solve each question. Find your answer in the decoder and write its letter in the box. The letters answer the riddle.

Name

Date

What did the triangle say to the circle?

  1. 1.Use long multiplication: 33 × 57
  2. 2.Use long multiplication: 59 × 59
  3. 3.Use an area model to work out 13 × 16.
  4. 4.17 × 3 = ?
  5. 5.8373 × 14 = ?
  6. 6.1842 × 16 = ?
  7. 7.90 × 6 = ?
  8. 8.Use an area model to work out 29 × 16.
  9. 9.Use long multiplication: 73 × 69
  10. 10.Use an area model to work out 31 × 20.
  11. 11.Use an area model to work out 25 × 25.
  12. 12.26 × 5 = ?
  13. 13.55 × 9 = ?
  14. 14.Use an area model to work out 38 × 12.

Decoder

540O

18625Q

620T

1881Y

28639Z

625L

456S

22243J

130E

2709X

5037N

208U

51R

29472P

3481O

117222E

464I

495S

The answer to the riddle

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14

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Answer key: Multi-digit multiplication riddle

What did the triangle say to the circle? You're pointless!

  1. 1. 1881 = Y
  2. 2. 3481 = O
  3. 3. 208 = U
  4. 4. 51 = R
  5. 5. 117222 = E
  6. 6. 29472 = P
  7. 7. 540 = O
  8. 8. 464 = I
  9. 9. 5037 = N
  10. 10. 620 = T
  11. 11. 625 = L
  12. 12. 130 = E
  13. 13. 495 = S
  14. 14. 456 = S

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