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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 541 · 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. 1.5 × 49 =
  2. 2.13 × 49 =
  3. 3.8 × 49 =
  4. 4.15 × 99 =
  5. 5.11 × 29 =
  6. 6.19 × 98 =
  7. 7.34 × 99 =
  8. 8.6 × 19 =
  9. 9.5 × 9 =
  10. 10.13 × 99 =
  11. 11.15 × 19 =
  12. 12.12 × 29 =
  13. 13.14 × 49 =
  14. 14.37 × 99 =
  15. 15.3 × 9 =
  16. 16.34 × 99 =
  17. 17.15 × 9 =
  18. 18.13 × 29 =
  19. 19.10 × 9 =
  20. 20.14 × 19 =
  21. 21.14 × 99 =
  22. 22.13 × 9 =
  23. 23.36 × 99 =
  24. 24.6 × 19 =
  25. 25.13 × 49 =
  26. 26.3 × 19 =
  27. 27.9 × 29 =
  28. 28.31 × 98 =
  29. 29.5 × 9 =
  30. 30.6 × 49 =
  31. 31.3 × 19 =
  32. 32.9 × 29 =
  33. 33.9 × 9 =
  34. 34.7 × 9 =
  35. 35.9 × 99 =
  36. 36.3 × 29 =
  37. 37.12 × 9 =
  38. 38.14 × 9 =
  39. 39.8 × 49 =
  40. 40.12 × 49 =

Answer key

  1. 245
  2. 637
  3. 392
  4. 1485
  5. 319
  6. 1862
  7. 3366
  8. 114
  9. 45
  10. 1287
  11. 285
  12. 348
  13. 686
  14. 3663
  15. 27
  16. 3366
  17. 135
  18. 377
  19. 90
  20. 266
  21. 1386
  22. 117
  23. 3564
  24. 114
  25. 637
  26. 57
  27. 261
  28. 3038
  29. 45
  30. 294
  31. 57
  32. 261
  33. 81
  34. 63
  35. 891
  36. 87
  37. 108
  38. 126
  39. 392
  40. 588

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