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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 439 · 40 questions
TalentJR

How it works (Round and adjust): Round up: 49 is 50 − 1, 98 is 100 − 2. Multiply by the round number. Take away the number times the bit you added.

NameDateTime takenScore ___ / 40
  1. 1.17 × 99 =
  2. 2.3 × 9 =
  3. 3.5 × 19 =
  4. 4.14 × 29 =
  5. 5.13 × 19 =
  6. 6.3 × 9 =
  7. 7.32 × 99 =
  8. 8.11 × 29 =
  9. 9.12 × 9 =
  10. 10.11 × 49 =
  11. 11.21 × 98 =
  12. 12.9 × 9 =
  13. 13.8 × 29 =
  14. 14.8 × 49 =
  15. 15.11 × 49 =
  16. 16.15 × 19 =
  17. 17.6 × 29 =
  18. 18.36 × 99 =
  19. 19.14 × 19 =
  20. 20.20 × 99 =
  21. 21.13 × 9 =
  22. 22.7 × 29 =
  23. 23.16 × 99 =
  24. 24.28 × 99 =
  25. 25.13 × 49 =
  26. 26.4 × 9 =
  27. 27.11 × 19 =
  28. 28.6 × 19 =
  29. 29.9 × 9 =
  30. 30.3 × 9 =
  31. 31.15 × 29 =
  32. 32.12 × 29 =
  33. 33.10 × 49 =
  34. 34.6 × 49 =
  35. 35.9 × 9 =
  36. 36.3 × 99 =
  37. 37.7 × 9 =
  38. 38.10 × 99 =
  39. 39.3 × 29 =
  40. 40.14 × 19 =

Answer key

  1. 1683
  2. 27
  3. 95
  4. 406
  5. 247
  6. 27
  7. 3168
  8. 319
  9. 108
  10. 539
  11. 2058
  12. 81
  13. 232
  14. 392
  15. 539
  16. 285
  17. 174
  18. 3564
  19. 266
  20. 1980
  21. 117
  22. 203
  23. 1584
  24. 2772
  25. 637
  26. 36
  27. 209
  28. 114
  29. 81
  30. 27
  31. 435
  32. 348
  33. 490
  34. 294
  35. 81
  36. 297
  37. 63
  38. 990
  39. 87
  40. 266

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