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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 514 · 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. 1.15 × 9 =
  2. 2.7 × 19 =
  3. 3.34 × 99 =
  4. 4.6 × 49 =
  5. 5.18 × 98 =
  6. 6.4 × 19 =
  7. 7.3 × 29 =
  8. 8.3 × 98 =
  9. 9.5 × 19 =
  10. 10.7 × 49 =
  11. 11.38 × 99 =
  12. 12.14 × 9 =
  13. 13.5 × 98 =
  14. 14.6 × 9 =
  15. 15.14 × 49 =
  16. 16.5 × 98 =
  17. 17.3 × 98 =
  18. 18.10 × 9 =
  19. 19.13 × 9 =
  20. 20.14 × 29 =
  21. 21.12 × 9 =
  22. 22.19 × 99 =
  23. 23.8 × 29 =
  24. 24.5 × 99 =
  25. 25.21 × 98 =
  26. 26.34 × 99 =
  27. 27.12 × 9 =
  28. 28.35 × 98 =
  29. 29.10 × 9 =
  30. 30.9 × 49 =
  31. 31.10 × 49 =
  32. 32.9 × 19 =
  33. 33.14 × 29 =
  34. 34.5 × 99 =
  35. 35.34 × 99 =
  36. 36.9 × 29 =
  37. 37.10 × 99 =
  38. 38.3 × 99 =
  39. 39.8 × 9 =
  40. 40.11 × 19 =

Answer key

  1. 135
  2. 133
  3. 3366
  4. 294
  5. 1764
  6. 76
  7. 87
  8. 294
  9. 95
  10. 343
  11. 3762
  12. 126
  13. 490
  14. 54
  15. 686
  16. 490
  17. 294
  18. 90
  19. 117
  20. 406
  21. 108
  22. 1881
  23. 232
  24. 495
  25. 2058
  26. 3366
  27. 108
  28. 3430
  29. 90
  30. 441
  31. 490
  32. 171
  33. 406
  34. 495
  35. 3366
  36. 261
  37. 990
  38. 297
  39. 72
  40. 209

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