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3-Digit by 1-Digit Multiplication Worksheet

Mental maths lesson 22: Multiply 3-digit by 1-digit, hundreds first · Set 79 · 40 questions
TalentJR

How to do it in your head (Biggest part first): Split the 3-digit number into hundreds, tens and ones. Multiply the hundreds and keep that number in your head. Multiply the tens and add, then multiply the ones and add.

NameDateTime takenScore ___ / 40
  1. 1.428 × 3 =
  2. 2.271 × 9 =
  3. 3.787 × 7 =
  4. 4.135 × 6 =
  5. 5.164 × 5 =
  6. 6.299 × 6 =
  7. 7.523 × 3 =
  8. 8.721 × 7 =
  9. 9.547 × 9 =
  10. 10.371 × 5 =
  11. 11.803 × 8 =
  12. 12.688 × 7 =
  13. 13.866 × 9 =
  14. 14.234 × 4 =
  15. 15.191 × 8 =
  16. 16.636 × 3 =
  17. 17.146 × 3 =
  18. 18.518 × 5 =
  19. 19.442 × 3 =
  20. 20.401 × 7 =
  21. 21.596 × 4 =
  22. 22.638 × 4 =
  23. 23.666 × 7 =
  24. 24.554 × 7 =
  25. 25.297 × 3 =
  26. 26.327 × 9 =
  27. 27.958 × 7 =
  28. 28.725 × 3 =
  29. 29.389 × 7 =
  30. 30.981 × 3 =
  31. 31.541 × 9 =
  32. 32.296 × 4 =
  33. 33.123 × 3 =
  34. 34.793 × 9 =
  35. 35.869 × 3 =
  36. 36.575 × 3 =
  37. 37.904 × 4 =
  38. 38.737 × 3 =
  39. 39.393 × 3 =
  40. 40.603 × 4 =

Answer key

  1. 1284
  2. 2439
  3. 5509
  4. 810
  5. 820
  6. 1794
  7. 1569
  8. 5047
  9. 4923
  10. 1855
  11. 6424
  12. 4816
  13. 7794
  14. 936
  15. 1528
  16. 1908
  17. 438
  18. 2590
  19. 1326
  20. 2807
  21. 2384
  22. 2552
  23. 4662
  24. 3878
  25. 891
  26. 2943
  27. 6706
  28. 2175
  29. 2723
  30. 2943
  31. 4869
  32. 1184
  33. 369
  34. 7137
  35. 2607
  36. 1725
  37. 3616
  38. 2211
  39. 1179
  40. 2412

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