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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 665 · 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. 1.9 × 98 =
  2. 2.5 × 49 =
  3. 3.16 × 98 =
  4. 4.6 × 19 =
  5. 5.22 × 98 =
  6. 6.10 × 9 =
  7. 7.11 × 9 =
  8. 8.39 × 99 =
  9. 9.4 × 9 =
  10. 10.13 × 19 =
  11. 11.36 × 98 =
  12. 12.33 × 99 =
  13. 13.15 × 19 =
  14. 14.10 × 19 =
  15. 15.11 × 29 =
  16. 16.28 × 99 =
  17. 17.7 × 49 =
  18. 18.6 × 9 =
  19. 19.9 × 9 =
  20. 20.11 × 9 =
  21. 21.15 × 9 =
  22. 22.4 × 98 =
  23. 23.10 × 98 =
  24. 24.4 × 98 =
  25. 25.4 × 19 =
  26. 26.34 × 99 =
  27. 27.3 × 9 =
  28. 28.26 × 98 =
  29. 29.4 × 19 =
  30. 30.22 × 98 =
  31. 31.4 × 29 =
  32. 32.7 × 9 =
  33. 33.26 × 99 =
  34. 34.5 × 19 =
  35. 35.10 × 98 =
  36. 36.3 × 29 =
  37. 37.6 × 19 =
  38. 38.9 × 9 =
  39. 39.13 × 49 =
  40. 40.37 × 98 =

Answer key

  1. 882
  2. 245
  3. 1568
  4. 114
  5. 2156
  6. 90
  7. 99
  8. 3861
  9. 36
  10. 247
  11. 3528
  12. 3267
  13. 285
  14. 190
  15. 319
  16. 2772
  17. 343
  18. 54
  19. 81
  20. 99
  21. 135
  22. 392
  23. 980
  24. 392
  25. 76
  26. 3366
  27. 27
  28. 2548
  29. 76
  30. 2156
  31. 116
  32. 63
  33. 2574
  34. 95
  35. 980
  36. 87
  37. 114
  38. 81
  39. 637
  40. 3626

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