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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 251 · 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. 1.25 × 99 =
  2. 2.32 × 99 =
  3. 3.6 × 9 =
  4. 4.3 × 49 =
  5. 5.3 × 49 =
  6. 6.3 × 98 =
  7. 7.7 × 9 =
  8. 8.3 × 29 =
  9. 9.3 × 19 =
  10. 10.30 × 99 =
  11. 11.9 × 98 =
  12. 12.4 × 49 =
  13. 13.4 × 29 =
  14. 14.10 × 19 =
  15. 15.22 × 98 =
  16. 16.12 × 49 =
  17. 17.9 × 19 =
  18. 18.10 × 49 =
  19. 19.39 × 99 =
  20. 20.3 × 49 =
  21. 21.9 × 29 =
  22. 22.10 × 19 =
  23. 23.9 × 49 =
  24. 24.17 × 99 =
  25. 25.9 × 9 =
  26. 26.3 × 99 =
  27. 27.11 × 49 =
  28. 28.7 × 98 =
  29. 29.22 × 98 =
  30. 30.12 × 19 =
  31. 31.12 × 99 =
  32. 32.6 × 9 =
  33. 33.18 × 98 =
  34. 34.10 × 9 =
  35. 35.11 × 29 =
  36. 36.9 × 9 =
  37. 37.3 × 9 =
  38. 38.12 × 29 =
  39. 39.19 × 98 =
  40. 40.9 × 9 =

Answer key

  1. 2475
  2. 3168
  3. 54
  4. 147
  5. 147
  6. 294
  7. 63
  8. 87
  9. 57
  10. 2970
  11. 882
  12. 196
  13. 116
  14. 190
  15. 2156
  16. 588
  17. 171
  18. 490
  19. 3861
  20. 147
  21. 261
  22. 190
  23. 441
  24. 1683
  25. 81
  26. 297
  27. 539
  28. 686
  29. 2156
  30. 228
  31. 1188
  32. 54
  33. 1764
  34. 90
  35. 319
  36. 81
  37. 27
  38. 348
  39. 1862
  40. 81

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