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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 699 · 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. 1.17 × 99 =
  2. 2.5 × 19 =
  3. 3.26 × 99 =
  4. 4.4 × 19 =
  5. 5.22 × 99 =
  6. 6.7 × 49 =
  7. 7.7 × 9 =
  8. 8.10 × 49 =
  9. 9.5 × 29 =
  10. 10.14 × 19 =
  11. 11.9 × 49 =
  12. 12.5 × 29 =
  13. 13.5 × 29 =
  14. 14.6 × 49 =
  15. 15.4 × 19 =
  16. 16.4 × 49 =
  17. 17.3 × 98 =
  18. 18.25 × 98 =
  19. 19.13 × 49 =
  20. 20.16 × 98 =
  21. 21.9 × 99 =
  22. 22.6 × 49 =
  23. 23.14 × 29 =
  24. 24.7 × 29 =
  25. 25.4 × 9 =
  26. 26.7 × 9 =
  27. 27.11 × 9 =
  28. 28.20 × 99 =
  29. 29.20 × 99 =
  30. 30.6 × 99 =
  31. 31.10 × 49 =
  32. 32.14 × 49 =
  33. 33.4 × 9 =
  34. 34.5 × 19 =
  35. 35.9 × 9 =
  36. 36.9 × 99 =
  37. 37.14 × 98 =
  38. 38.31 × 99 =
  39. 39.6 × 19 =
  40. 40.6 × 49 =

Answer key

  1. 1683
  2. 95
  3. 2574
  4. 76
  5. 2178
  6. 343
  7. 63
  8. 490
  9. 145
  10. 266
  11. 441
  12. 145
  13. 145
  14. 294
  15. 76
  16. 196
  17. 294
  18. 2450
  19. 637
  20. 1568
  21. 891
  22. 294
  23. 406
  24. 203
  25. 36
  26. 63
  27. 99
  28. 1980
  29. 1980
  30. 594
  31. 490
  32. 686
  33. 36
  34. 95
  35. 81
  36. 891
  37. 1372
  38. 3069
  39. 114
  40. 294

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