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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 813 · 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. 1.25 × 98 =
  2. 2.9 × 9 =
  3. 3.5 × 9 =
  4. 4.5 × 9 =
  5. 5.35 × 99 =
  6. 6.12 × 19 =
  7. 7.9 × 9 =
  8. 8.5 × 19 =
  9. 9.6 × 29 =
  10. 10.9 × 49 =
  11. 11.10 × 19 =
  12. 12.5 × 19 =
  13. 13.14 × 98 =
  14. 14.12 × 49 =
  15. 15.9 × 99 =
  16. 16.7 × 19 =
  17. 17.31 × 98 =
  18. 18.13 × 49 =
  19. 19.8 × 98 =
  20. 20.37 × 98 =
  21. 21.7 × 9 =
  22. 22.5 × 19 =
  23. 23.14 × 19 =
  24. 24.14 × 29 =
  25. 25.5 × 29 =
  26. 26.10 × 9 =
  27. 27.3 × 9 =
  28. 28.7 × 29 =
  29. 29.7 × 9 =
  30. 30.5 × 9 =
  31. 31.3 × 29 =
  32. 32.11 × 49 =
  33. 33.14 × 98 =
  34. 34.4 × 98 =
  35. 35.11 × 19 =
  36. 36.7 × 98 =
  37. 37.3 × 98 =
  38. 38.35 × 98 =
  39. 39.3 × 19 =
  40. 40.7 × 49 =

Answer key

  1. 2450
  2. 81
  3. 45
  4. 45
  5. 3465
  6. 228
  7. 81
  8. 95
  9. 174
  10. 441
  11. 190
  12. 95
  13. 1372
  14. 588
  15. 891
  16. 133
  17. 3038
  18. 637
  19. 784
  20. 3626
  21. 63
  22. 95
  23. 266
  24. 406
  25. 145
  26. 90
  27. 27
  28. 203
  29. 63
  30. 45
  31. 87
  32. 539
  33. 1372
  34. 392
  35. 209
  36. 686
  37. 294
  38. 3430
  39. 57
  40. 343

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