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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 580 · 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. 1.14 × 29 =
  2. 2.6 × 19 =
  3. 3.8 × 9 =
  4. 4.6 × 49 =
  5. 5.22 × 99 =
  6. 6.15 × 19 =
  7. 7.10 × 9 =
  8. 8.14 × 49 =
  9. 9.8 × 98 =
  10. 10.9 × 9 =
  11. 11.14 × 99 =
  12. 12.14 × 29 =
  13. 13.4 × 29 =
  14. 14.22 × 99 =
  15. 15.11 × 9 =
  16. 16.13 × 9 =
  17. 17.3 × 99 =
  18. 18.4 × 29 =
  19. 19.12 × 29 =
  20. 20.5 × 9 =
  21. 21.14 × 19 =
  22. 22.11 × 19 =
  23. 23.22 × 99 =
  24. 24.16 × 98 =
  25. 25.6 × 19 =
  26. 26.13 × 29 =
  27. 27.10 × 49 =
  28. 28.11 × 29 =
  29. 29.8 × 98 =
  30. 30.39 × 98 =
  31. 31.38 × 99 =
  32. 32.11 × 9 =
  33. 33.14 × 49 =
  34. 34.13 × 9 =
  35. 35.3 × 19 =
  36. 36.18 × 98 =
  37. 37.12 × 99 =
  38. 38.40 × 99 =
  39. 39.10 × 19 =
  40. 40.26 × 99 =

Answer key

  1. 406
  2. 114
  3. 72
  4. 294
  5. 2178
  6. 285
  7. 90
  8. 686
  9. 784
  10. 81
  11. 1386
  12. 406
  13. 116
  14. 2178
  15. 99
  16. 117
  17. 297
  18. 116
  19. 348
  20. 45
  21. 266
  22. 209
  23. 2178
  24. 1568
  25. 114
  26. 377
  27. 490
  28. 319
  29. 784
  30. 3822
  31. 3762
  32. 99
  33. 686
  34. 117
  35. 57
  36. 1764
  37. 1188
  38. 3960
  39. 190
  40. 2574

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