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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 840 · 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. 1.15 × 49 =
  2. 2.9 × 9 =
  3. 3.9 × 99 =
  4. 4.11 × 19 =
  5. 5.6 × 9 =
  6. 6.38 × 98 =
  7. 7.9 × 19 =
  8. 8.5 × 9 =
  9. 9.4 × 9 =
  10. 10.10 × 49 =
  11. 11.26 × 99 =
  12. 12.14 × 98 =
  13. 13.26 × 99 =
  14. 14.25 × 99 =
  15. 15.32 × 98 =
  16. 16.4 × 99 =
  17. 17.30 × 99 =
  18. 18.3 × 49 =
  19. 19.34 × 99 =
  20. 20.3 × 19 =
  21. 21.9 × 49 =
  22. 22.7 × 49 =
  23. 23.4 × 9 =
  24. 24.13 × 49 =
  25. 25.5 × 29 =
  26. 26.3 × 9 =
  27. 27.38 × 98 =
  28. 28.29 × 99 =
  29. 29.15 × 98 =
  30. 30.15 × 9 =
  31. 31.5 × 98 =
  32. 32.5 × 19 =
  33. 33.10 × 9 =
  34. 34.3 × 19 =
  35. 35.9 × 19 =
  36. 36.13 × 9 =
  37. 37.13 × 9 =
  38. 38.7 × 9 =
  39. 39.7 × 49 =
  40. 40.6 × 98 =

Answer key

  1. 735
  2. 81
  3. 891
  4. 209
  5. 54
  6. 3724
  7. 171
  8. 45
  9. 36
  10. 490
  11. 2574
  12. 1372
  13. 2574
  14. 2475
  15. 3136
  16. 396
  17. 2970
  18. 147
  19. 3366
  20. 57
  21. 441
  22. 343
  23. 36
  24. 637
  25. 145
  26. 27
  27. 3724
  28. 2871
  29. 1470
  30. 135
  31. 490
  32. 95
  33. 90
  34. 57
  35. 171
  36. 117
  37. 117
  38. 63
  39. 343
  40. 588

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