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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 774 · 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. 1.8 × 29 =
  2. 2.12 × 49 =
  3. 3.9 × 9 =
  4. 4.13 × 98 =
  5. 5.5 × 29 =
  6. 6.37 × 99 =
  7. 7.6 × 9 =
  8. 8.9 × 98 =
  9. 9.8 × 29 =
  10. 10.9 × 9 =
  11. 11.14 × 19 =
  12. 12.4 × 19 =
  13. 13.10 × 49 =
  14. 14.10 × 98 =
  15. 15.28 × 99 =
  16. 16.22 × 98 =
  17. 17.5 × 19 =
  18. 18.20 × 99 =
  19. 19.8 × 9 =
  20. 20.5 × 9 =
  21. 21.36 × 98 =
  22. 22.12 × 9 =
  23. 23.5 × 9 =
  24. 24.5 × 49 =
  25. 25.9 × 49 =
  26. 26.14 × 19 =
  27. 27.26 × 98 =
  28. 28.19 × 99 =
  29. 29.6 × 49 =
  30. 30.26 × 99 =
  31. 31.12 × 29 =
  32. 32.7 × 9 =
  33. 33.30 × 99 =
  34. 34.4 × 9 =
  35. 35.13 × 9 =
  36. 36.15 × 49 =
  37. 37.9 × 99 =
  38. 38.3 × 9 =
  39. 39.8 × 9 =
  40. 40.7 × 9 =

Answer key

  1. 232
  2. 588
  3. 81
  4. 1274
  5. 145
  6. 3663
  7. 54
  8. 882
  9. 232
  10. 81
  11. 266
  12. 76
  13. 490
  14. 980
  15. 2772
  16. 2156
  17. 95
  18. 1980
  19. 72
  20. 45
  21. 3528
  22. 108
  23. 45
  24. 245
  25. 441
  26. 266
  27. 2548
  28. 1881
  29. 294
  30. 2574
  31. 348
  32. 63
  33. 2970
  34. 36
  35. 117
  36. 735
  37. 891
  38. 27
  39. 72
  40. 63

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