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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 140 · 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. 1.29 × 98 =
  2. 2.14 × 98 =
  3. 3.14 × 9 =
  4. 4.16 × 99 =
  5. 5.6 × 49 =
  6. 6.11 × 98 =
  7. 7.6 × 29 =
  8. 8.14 × 49 =
  9. 9.11 × 9 =
  10. 10.22 × 98 =
  11. 11.29 × 99 =
  12. 12.8 × 49 =
  13. 13.3 × 9 =
  14. 14.14 × 19 =
  15. 15.14 × 29 =
  16. 16.6 × 9 =
  17. 17.16 × 99 =
  18. 18.3 × 19 =
  19. 19.26 × 98 =
  20. 20.10 × 49 =
  21. 21.37 × 98 =
  22. 22.24 × 98 =
  23. 23.4 × 19 =
  24. 24.3 × 9 =
  25. 25.12 × 19 =
  26. 26.9 × 99 =
  27. 27.8 × 49 =
  28. 28.7 × 19 =
  29. 29.13 × 9 =
  30. 30.11 × 9 =
  31. 31.13 × 19 =
  32. 32.3 × 29 =
  33. 33.14 × 29 =
  34. 34.15 × 19 =
  35. 35.25 × 98 =
  36. 36.14 × 49 =
  37. 37.8 × 29 =
  38. 38.12 × 99 =
  39. 39.14 × 9 =
  40. 40.13 × 49 =

Answer key

  1. 2842
  2. 1372
  3. 126
  4. 1584
  5. 294
  6. 1078
  7. 174
  8. 686
  9. 99
  10. 2156
  11. 2871
  12. 392
  13. 27
  14. 266
  15. 406
  16. 54
  17. 1584
  18. 57
  19. 2548
  20. 490
  21. 3626
  22. 2352
  23. 76
  24. 27
  25. 228
  26. 891
  27. 392
  28. 133
  29. 117
  30. 99
  31. 247
  32. 87
  33. 406
  34. 285
  35. 2450
  36. 686
  37. 232
  38. 1188
  39. 126
  40. 637

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