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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 843 · 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. 1.10 × 19 =
  2. 2.7 × 98 =
  3. 3.37 × 98 =
  4. 4.4 × 19 =
  5. 5.10 × 19 =
  6. 6.14 × 19 =
  7. 7.11 × 9 =
  8. 8.35 × 98 =
  9. 9.9 × 99 =
  10. 10.5 × 49 =
  11. 11.11 × 29 =
  12. 12.21 × 98 =
  13. 13.11 × 29 =
  14. 14.9 × 49 =
  15. 15.7 × 19 =
  16. 16.8 × 19 =
  17. 17.38 × 98 =
  18. 18.10 × 98 =
  19. 19.29 × 98 =
  20. 20.12 × 9 =
  21. 21.39 × 98 =
  22. 22.13 × 98 =
  23. 23.15 × 19 =
  24. 24.8 × 9 =
  25. 25.3 × 99 =
  26. 26.3 × 49 =
  27. 27.5 × 49 =
  28. 28.29 × 98 =
  29. 29.13 × 98 =
  30. 30.5 × 9 =
  31. 31.11 × 19 =
  32. 32.23 × 99 =
  33. 33.4 × 98 =
  34. 34.6 × 29 =
  35. 35.12 × 9 =
  36. 36.5 × 29 =
  37. 37.3 × 9 =
  38. 38.17 × 99 =
  39. 39.5 × 49 =
  40. 40.7 × 9 =

Answer key

  1. 190
  2. 686
  3. 3626
  4. 76
  5. 190
  6. 266
  7. 99
  8. 3430
  9. 891
  10. 245
  11. 319
  12. 2058
  13. 319
  14. 441
  15. 133
  16. 152
  17. 3724
  18. 980
  19. 2842
  20. 108
  21. 3822
  22. 1274
  23. 285
  24. 72
  25. 297
  26. 147
  27. 245
  28. 2842
  29. 1274
  30. 45
  31. 209
  32. 2277
  33. 392
  34. 174
  35. 108
  36. 145
  37. 27
  38. 1683
  39. 245
  40. 63

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