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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 814 · 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. 1.32 × 98 =
  2. 2.29 × 99 =
  3. 3.13 × 29 =
  4. 4.22 × 98 =
  5. 5.7 × 19 =
  6. 6.6 × 9 =
  7. 7.3 × 49 =
  8. 8.24 × 98 =
  9. 9.5 × 19 =
  10. 10.40 × 99 =
  11. 11.7 × 49 =
  12. 12.8 × 9 =
  13. 13.12 × 98 =
  14. 14.11 × 9 =
  15. 15.12 × 29 =
  16. 16.13 × 9 =
  17. 17.4 × 29 =
  18. 18.8 × 98 =
  19. 19.9 × 98 =
  20. 20.24 × 99 =
  21. 21.19 × 99 =
  22. 22.10 × 9 =
  23. 23.3 × 9 =
  24. 24.13 × 9 =
  25. 25.3 × 19 =
  26. 26.4 × 98 =
  27. 27.7 × 49 =
  28. 28.9 × 19 =
  29. 29.5 × 19 =
  30. 30.11 × 49 =
  31. 31.8 × 9 =
  32. 32.32 × 99 =
  33. 33.5 × 98 =
  34. 34.18 × 99 =
  35. 35.4 × 19 =
  36. 36.9 × 19 =
  37. 37.3 × 49 =
  38. 38.15 × 19 =
  39. 39.4 × 9 =
  40. 40.3 × 49 =

Answer key

  1. 3136
  2. 2871
  3. 377
  4. 2156
  5. 133
  6. 54
  7. 147
  8. 2352
  9. 95
  10. 3960
  11. 343
  12. 72
  13. 1176
  14. 99
  15. 348
  16. 117
  17. 116
  18. 784
  19. 882
  20. 2376
  21. 1881
  22. 90
  23. 27
  24. 117
  25. 57
  26. 392
  27. 343
  28. 171
  29. 95
  30. 539
  31. 72
  32. 3168
  33. 490
  34. 1782
  35. 76
  36. 171
  37. 147
  38. 285
  39. 36
  40. 147

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