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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 768 · 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. 1.13 × 49 =
  2. 2.3 × 9 =
  3. 3.8 × 49 =
  4. 4.14 × 9 =
  5. 5.8 × 49 =
  6. 6.5 × 19 =
  7. 7.15 × 9 =
  8. 8.24 × 99 =
  9. 9.5 × 99 =
  10. 10.5 × 9 =
  11. 11.4 × 49 =
  12. 12.11 × 29 =
  13. 13.10 × 9 =
  14. 14.11 × 49 =
  15. 15.8 × 9 =
  16. 16.5 × 9 =
  17. 17.30 × 99 =
  18. 18.38 × 98 =
  19. 19.24 × 98 =
  20. 20.14 × 19 =
  21. 21.10 × 99 =
  22. 22.29 × 98 =
  23. 23.22 × 99 =
  24. 24.10 × 19 =
  25. 25.8 × 29 =
  26. 26.6 × 9 =
  27. 27.4 × 9 =
  28. 28.3 × 98 =
  29. 29.5 × 99 =
  30. 30.28 × 99 =
  31. 31.15 × 9 =
  32. 32.37 × 99 =
  33. 33.9 × 49 =
  34. 34.12 × 9 =
  35. 35.16 × 99 =
  36. 36.14 × 9 =
  37. 37.6 × 19 =
  38. 38.11 × 98 =
  39. 39.25 × 99 =
  40. 40.14 × 49 =

Answer key

  1. 637
  2. 27
  3. 392
  4. 126
  5. 392
  6. 95
  7. 135
  8. 2376
  9. 495
  10. 45
  11. 196
  12. 319
  13. 90
  14. 539
  15. 72
  16. 45
  17. 2970
  18. 3724
  19. 2352
  20. 266
  21. 990
  22. 2842
  23. 2178
  24. 190
  25. 232
  26. 54
  27. 36
  28. 294
  29. 495
  30. 2772
  31. 135
  32. 3663
  33. 441
  34. 108
  35. 1584
  36. 126
  37. 114
  38. 1078
  39. 2475
  40. 686

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