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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 711 · 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. 1.6 × 19 =
  2. 2.8 × 29 =
  3. 3.12 × 9 =
  4. 4.13 × 9 =
  5. 5.5 × 19 =
  6. 6.15 × 9 =
  7. 7.3 × 9 =
  8. 8.6 × 49 =
  9. 9.5 × 99 =
  10. 10.12 × 29 =
  11. 11.4 × 9 =
  12. 12.36 × 98 =
  13. 13.18 × 98 =
  14. 14.3 × 29 =
  15. 15.9 × 99 =
  16. 16.3 × 9 =
  17. 17.4 × 49 =
  18. 18.8 × 19 =
  19. 19.8 × 29 =
  20. 20.15 × 49 =
  21. 21.7 × 19 =
  22. 22.23 × 98 =
  23. 23.15 × 19 =
  24. 24.10 × 19 =
  25. 25.15 × 29 =
  26. 26.13 × 19 =
  27. 27.13 × 49 =
  28. 28.38 × 99 =
  29. 29.33 × 98 =
  30. 30.10 × 49 =
  31. 31.6 × 49 =
  32. 32.9 × 49 =
  33. 33.13 × 9 =
  34. 34.12 × 9 =
  35. 35.33 × 99 =
  36. 36.5 × 29 =
  37. 37.21 × 99 =
  38. 38.11 × 19 =
  39. 39.3 × 9 =
  40. 40.4 × 98 =

Answer key

  1. 114
  2. 232
  3. 108
  4. 117
  5. 95
  6. 135
  7. 27
  8. 294
  9. 495
  10. 348
  11. 36
  12. 3528
  13. 1764
  14. 87
  15. 891
  16. 27
  17. 196
  18. 152
  19. 232
  20. 735
  21. 133
  22. 2254
  23. 285
  24. 190
  25. 435
  26. 247
  27. 637
  28. 3762
  29. 3234
  30. 490
  31. 294
  32. 441
  33. 117
  34. 108
  35. 3267
  36. 145
  37. 2079
  38. 209
  39. 27
  40. 392

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