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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 147 · 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. 1.5 × 9 =
  2. 2.23 × 99 =
  3. 3.5 × 19 =
  4. 4.14 × 29 =
  5. 5.3 × 99 =
  6. 6.29 × 99 =
  7. 7.3 × 29 =
  8. 8.15 × 49 =
  9. 9.32 × 98 =
  10. 10.7 × 29 =
  11. 11.37 × 98 =
  12. 12.14 × 19 =
  13. 13.10 × 99 =
  14. 14.21 × 98 =
  15. 15.8 × 49 =
  16. 16.3 × 19 =
  17. 17.13 × 9 =
  18. 18.29 × 98 =
  19. 19.9 × 98 =
  20. 20.10 × 9 =
  21. 21.15 × 9 =
  22. 22.15 × 9 =
  23. 23.17 × 99 =
  24. 24.7 × 19 =
  25. 25.7 × 19 =
  26. 26.5 × 98 =
  27. 27.14 × 29 =
  28. 28.15 × 49 =
  29. 29.39 × 98 =
  30. 30.8 × 9 =
  31. 31.13 × 98 =
  32. 32.25 × 98 =
  33. 33.8 × 9 =
  34. 34.3 × 49 =
  35. 35.3 × 29 =
  36. 36.19 × 98 =
  37. 37.13 × 9 =
  38. 38.12 × 9 =
  39. 39.6 × 9 =
  40. 40.13 × 19 =

Answer key

  1. 45
  2. 2277
  3. 95
  4. 406
  5. 297
  6. 2871
  7. 87
  8. 735
  9. 3136
  10. 203
  11. 3626
  12. 266
  13. 990
  14. 2058
  15. 392
  16. 57
  17. 117
  18. 2842
  19. 882
  20. 90
  21. 135
  22. 135
  23. 1683
  24. 133
  25. 133
  26. 490
  27. 406
  28. 735
  29. 3822
  30. 72
  31. 1274
  32. 2450
  33. 72
  34. 147
  35. 87
  36. 1862
  37. 117
  38. 108
  39. 54
  40. 247

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