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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 780 · 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. 1.35 × 98 =
  2. 2.3 × 29 =
  3. 3.12 × 9 =
  4. 4.4 × 29 =
  5. 5.9 × 49 =
  6. 6.13 × 49 =
  7. 7.10 × 19 =
  8. 8.7 × 29 =
  9. 9.15 × 19 =
  10. 10.28 × 99 =
  11. 11.34 × 98 =
  12. 12.4 × 29 =
  13. 13.7 × 49 =
  14. 14.15 × 19 =
  15. 15.13 × 9 =
  16. 16.12 × 9 =
  17. 17.7 × 49 =
  18. 18.8 × 19 =
  19. 19.5 × 19 =
  20. 20.4 × 29 =
  21. 21.10 × 9 =
  22. 22.7 × 99 =
  23. 23.34 × 98 =
  24. 24.9 × 19 =
  25. 25.11 × 19 =
  26. 26.13 × 29 =
  27. 27.13 × 19 =
  28. 28.3 × 19 =
  29. 29.13 × 29 =
  30. 30.6 × 49 =
  31. 31.3 × 98 =
  32. 32.14 × 9 =
  33. 33.24 × 98 =
  34. 34.36 × 98 =
  35. 35.5 × 98 =
  36. 36.7 × 49 =
  37. 37.34 × 98 =
  38. 38.11 × 49 =
  39. 39.7 × 9 =
  40. 40.5 × 99 =

Answer key

  1. 3430
  2. 87
  3. 108
  4. 116
  5. 441
  6. 637
  7. 190
  8. 203
  9. 285
  10. 2772
  11. 3332
  12. 116
  13. 343
  14. 285
  15. 117
  16. 108
  17. 343
  18. 152
  19. 95
  20. 116
  21. 90
  22. 693
  23. 3332
  24. 171
  25. 209
  26. 377
  27. 247
  28. 57
  29. 377
  30. 294
  31. 294
  32. 126
  33. 2352
  34. 3528
  35. 490
  36. 343
  37. 3332
  38. 539
  39. 63
  40. 495

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