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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 583 · 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 × 49 =
  2. 2.12 × 9 =
  3. 3.21 × 99 =
  4. 4.14 × 9 =
  5. 5.9 × 19 =
  6. 6.10 × 49 =
  7. 7.19 × 98 =
  8. 8.8 × 9 =
  9. 9.6 × 49 =
  10. 10.15 × 29 =
  11. 11.10 × 9 =
  12. 12.14 × 19 =
  13. 13.12 × 9 =
  14. 14.12 × 29 =
  15. 15.14 × 29 =
  16. 16.4 × 19 =
  17. 17.6 × 19 =
  18. 18.10 × 29 =
  19. 19.9 × 99 =
  20. 20.8 × 98 =
  21. 21.7 × 29 =
  22. 22.8 × 29 =
  23. 23.5 × 98 =
  24. 24.9 × 9 =
  25. 25.12 × 9 =
  26. 26.26 × 98 =
  27. 27.12 × 29 =
  28. 28.6 × 49 =
  29. 29.32 × 98 =
  30. 30.10 × 19 =
  31. 31.10 × 19 =
  32. 32.13 × 99 =
  33. 33.37 × 99 =
  34. 34.8 × 49 =
  35. 35.10 × 49 =
  36. 36.7 × 29 =
  37. 37.7 × 49 =
  38. 38.11 × 19 =
  39. 39.12 × 19 =
  40. 40.40 × 98 =

Answer key

  1. 245
  2. 108
  3. 2079
  4. 126
  5. 171
  6. 490
  7. 1862
  8. 72
  9. 294
  10. 435
  11. 90
  12. 266
  13. 108
  14. 348
  15. 406
  16. 76
  17. 114
  18. 290
  19. 891
  20. 784
  21. 203
  22. 232
  23. 490
  24. 81
  25. 108
  26. 2548
  27. 348
  28. 294
  29. 3136
  30. 190
  31. 190
  32. 1287
  33. 3663
  34. 392
  35. 490
  36. 203
  37. 343
  38. 209
  39. 228
  40. 3920

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