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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 379 · 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. 1.10 × 29 =
  2. 2.15 × 9 =
  3. 3.15 × 49 =
  4. 4.12 × 29 =
  5. 5.5 × 29 =
  6. 6.12 × 9 =
  7. 7.8 × 29 =
  8. 8.13 × 49 =
  9. 9.5 × 29 =
  10. 10.3 × 9 =
  11. 11.39 × 98 =
  12. 12.3 × 99 =
  13. 13.15 × 19 =
  14. 14.10 × 19 =
  15. 15.12 × 19 =
  16. 16.11 × 29 =
  17. 17.8 × 49 =
  18. 18.3 × 19 =
  19. 19.9 × 49 =
  20. 20.10 × 19 =
  21. 21.7 × 9 =
  22. 22.13 × 19 =
  23. 23.13 × 29 =
  24. 24.8 × 29 =
  25. 25.3 × 9 =
  26. 26.14 × 99 =
  27. 27.18 × 98 =
  28. 28.9 × 29 =
  29. 29.9 × 19 =
  30. 30.19 × 99 =
  31. 31.5 × 9 =
  32. 32.7 × 9 =
  33. 33.34 × 98 =
  34. 34.28 × 99 =
  35. 35.39 × 98 =
  36. 36.15 × 49 =
  37. 37.12 × 9 =
  38. 38.28 × 98 =
  39. 39.3 × 9 =
  40. 40.5 × 49 =

Answer key

  1. 290
  2. 135
  3. 735
  4. 348
  5. 145
  6. 108
  7. 232
  8. 637
  9. 145
  10. 27
  11. 3822
  12. 297
  13. 285
  14. 190
  15. 228
  16. 319
  17. 392
  18. 57
  19. 441
  20. 190
  21. 63
  22. 247
  23. 377
  24. 232
  25. 27
  26. 1386
  27. 1764
  28. 261
  29. 171
  30. 1881
  31. 45
  32. 63
  33. 3332
  34. 2772
  35. 3822
  36. 735
  37. 108
  38. 2744
  39. 27
  40. 245

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