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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 99 · 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. 1.3 × 29 =
  2. 2.14 × 19 =
  3. 3.10 × 29 =
  4. 4.13 × 98 =
  5. 5.10 × 49 =
  6. 6.11 × 19 =
  7. 7.25 × 99 =
  8. 8.10 × 19 =
  9. 9.6 × 9 =
  10. 10.14 × 9 =
  11. 11.28 × 98 =
  12. 12.14 × 9 =
  13. 13.39 × 99 =
  14. 14.11 × 29 =
  15. 15.12 × 9 =
  16. 16.10 × 98 =
  17. 17.6 × 9 =
  18. 18.19 × 98 =
  19. 19.3 × 49 =
  20. 20.5 × 9 =
  21. 21.21 × 99 =
  22. 22.5 × 19 =
  23. 23.33 × 99 =
  24. 24.5 × 19 =
  25. 25.4 × 49 =
  26. 26.12 × 9 =
  27. 27.8 × 49 =
  28. 28.12 × 49 =
  29. 29.38 × 99 =
  30. 30.4 × 29 =
  31. 31.10 × 99 =
  32. 32.27 × 98 =
  33. 33.13 × 9 =
  34. 34.9 × 99 =
  35. 35.21 × 98 =
  36. 36.3 × 29 =
  37. 37.11 × 9 =
  38. 38.10 × 19 =
  39. 39.8 × 98 =
  40. 40.7 × 19 =

Answer key

  1. 87
  2. 266
  3. 290
  4. 1274
  5. 490
  6. 209
  7. 2475
  8. 190
  9. 54
  10. 126
  11. 2744
  12. 126
  13. 3861
  14. 319
  15. 108
  16. 980
  17. 54
  18. 1862
  19. 147
  20. 45
  21. 2079
  22. 95
  23. 3267
  24. 95
  25. 196
  26. 108
  27. 392
  28. 588
  29. 3762
  30. 116
  31. 990
  32. 2646
  33. 117
  34. 891
  35. 2058
  36. 87
  37. 99
  38. 190
  39. 784
  40. 133

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