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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 605 · 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. 1.16 × 99 =
  2. 2.5 × 9 =
  3. 3.27 × 99 =
  4. 4.26 × 98 =
  5. 5.3 × 49 =
  6. 6.30 × 99 =
  7. 7.3 × 29 =
  8. 8.10 × 29 =
  9. 9.9 × 49 =
  10. 10.13 × 19 =
  11. 11.11 × 9 =
  12. 12.8 × 9 =
  13. 13.3 × 29 =
  14. 14.11 × 19 =
  15. 15.3 × 9 =
  16. 16.8 × 49 =
  17. 17.7 × 19 =
  18. 18.4 × 19 =
  19. 19.9 × 98 =
  20. 20.12 × 49 =
  21. 21.6 × 19 =
  22. 22.10 × 49 =
  23. 23.6 × 49 =
  24. 24.5 × 19 =
  25. 25.31 × 98 =
  26. 26.19 × 98 =
  27. 27.7 × 49 =
  28. 28.6 × 29 =
  29. 29.6 × 9 =
  30. 30.7 × 29 =
  31. 31.3 × 49 =
  32. 32.12 × 98 =
  33. 33.32 × 99 =
  34. 34.8 × 29 =
  35. 35.10 × 19 =
  36. 36.31 × 98 =
  37. 37.3 × 19 =
  38. 38.12 × 9 =
  39. 39.6 × 98 =
  40. 40.4 × 9 =

Answer key

  1. 1584
  2. 45
  3. 2673
  4. 2548
  5. 147
  6. 2970
  7. 87
  8. 290
  9. 441
  10. 247
  11. 99
  12. 72
  13. 87
  14. 209
  15. 27
  16. 392
  17. 133
  18. 76
  19. 882
  20. 588
  21. 114
  22. 490
  23. 294
  24. 95
  25. 3038
  26. 1862
  27. 343
  28. 174
  29. 54
  30. 203
  31. 147
  32. 1176
  33. 3168
  34. 232
  35. 190
  36. 3038
  37. 57
  38. 108
  39. 588
  40. 36

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