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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 418 · 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 × 49 =
  2. 2.6 × 49 =
  3. 3.3 × 49 =
  4. 4.6 × 9 =
  5. 5.13 × 19 =
  6. 6.8 × 49 =
  7. 7.14 × 49 =
  8. 8.9 × 9 =
  9. 9.9 × 19 =
  10. 10.5 × 49 =
  11. 11.9 × 9 =
  12. 12.3 × 29 =
  13. 13.3 × 19 =
  14. 14.11 × 29 =
  15. 15.14 × 9 =
  16. 16.4 × 19 =
  17. 17.37 × 99 =
  18. 18.14 × 19 =
  19. 19.3 × 29 =
  20. 20.5 × 49 =
  21. 21.5 × 9 =
  22. 22.4 × 19 =
  23. 23.40 × 98 =
  24. 24.12 × 99 =
  25. 25.5 × 49 =
  26. 26.3 × 49 =
  27. 27.14 × 49 =
  28. 28.7 × 19 =
  29. 29.5 × 99 =
  30. 30.6 × 19 =
  31. 31.9 × 9 =
  32. 32.10 × 29 =
  33. 33.9 × 9 =
  34. 34.14 × 9 =
  35. 35.15 × 9 =
  36. 36.7 × 49 =
  37. 37.9 × 29 =
  38. 38.14 × 99 =
  39. 39.15 × 9 =
  40. 40.40 × 98 =

Answer key

  1. 490
  2. 294
  3. 147
  4. 54
  5. 247
  6. 392
  7. 686
  8. 81
  9. 171
  10. 245
  11. 81
  12. 87
  13. 57
  14. 319
  15. 126
  16. 76
  17. 3663
  18. 266
  19. 87
  20. 245
  21. 45
  22. 76
  23. 3920
  24. 1188
  25. 245
  26. 147
  27. 686
  28. 133
  29. 495
  30. 114
  31. 81
  32. 290
  33. 81
  34. 126
  35. 135
  36. 343
  37. 261
  38. 1386
  39. 135
  40. 3920

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