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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 715 · 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. 1.22 × 99 =
  2. 2.14 × 9 =
  3. 3.21 × 99 =
  4. 4.13 × 19 =
  5. 5.14 × 49 =
  6. 6.12 × 19 =
  7. 7.19 × 99 =
  8. 8.13 × 9 =
  9. 9.35 × 99 =
  10. 10.6 × 19 =
  11. 11.6 × 9 =
  12. 12.8 × 29 =
  13. 13.12 × 49 =
  14. 14.3 × 29 =
  15. 15.11 × 9 =
  16. 16.11 × 19 =
  17. 17.13 × 19 =
  18. 18.10 × 9 =
  19. 19.15 × 19 =
  20. 20.13 × 29 =
  21. 21.12 × 49 =
  22. 22.39 × 98 =
  23. 23.9 × 19 =
  24. 24.15 × 49 =
  25. 25.37 × 98 =
  26. 26.33 × 98 =
  27. 27.13 × 99 =
  28. 28.6 × 49 =
  29. 29.37 × 99 =
  30. 30.11 × 98 =
  31. 31.10 × 9 =
  32. 32.12 × 98 =
  33. 33.10 × 9 =
  34. 34.13 × 9 =
  35. 35.36 × 99 =
  36. 36.8 × 49 =
  37. 37.5 × 29 =
  38. 38.9 × 99 =
  39. 39.9 × 19 =
  40. 40.8 × 29 =

Answer key

  1. 2178
  2. 126
  3. 2079
  4. 247
  5. 686
  6. 228
  7. 1881
  8. 117
  9. 3465
  10. 114
  11. 54
  12. 232
  13. 588
  14. 87
  15. 99
  16. 209
  17. 247
  18. 90
  19. 285
  20. 377
  21. 588
  22. 3822
  23. 171
  24. 735
  25. 3626
  26. 3234
  27. 1287
  28. 294
  29. 3663
  30. 1078
  31. 90
  32. 1176
  33. 90
  34. 117
  35. 3564
  36. 392
  37. 145
  38. 891
  39. 171
  40. 232

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