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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 160 · 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 × 19 =
  2. 2.5 × 19 =
  3. 3.18 × 98 =
  4. 4.13 × 99 =
  5. 5.7 × 98 =
  6. 6.40 × 98 =
  7. 7.14 × 9 =
  8. 8.4 × 19 =
  9. 9.6 × 99 =
  10. 10.6 × 9 =
  11. 11.14 × 49 =
  12. 12.4 × 29 =
  13. 13.14 × 29 =
  14. 14.7 × 49 =
  15. 15.4 × 99 =
  16. 16.9 × 29 =
  17. 17.6 × 49 =
  18. 18.7 × 49 =
  19. 19.30 × 98 =
  20. 20.4 × 49 =
  21. 21.20 × 99 =
  22. 22.13 × 49 =
  23. 23.5 × 29 =
  24. 24.28 × 98 =
  25. 25.6 × 29 =
  26. 26.3 × 9 =
  27. 27.10 × 99 =
  28. 28.3 × 29 =
  29. 29.13 × 49 =
  30. 30.8 × 19 =
  31. 31.13 × 98 =
  32. 32.8 × 19 =
  33. 33.5 × 9 =
  34. 34.11 × 29 =
  35. 35.9 × 98 =
  36. 36.33 × 98 =
  37. 37.10 × 19 =
  38. 38.3 × 29 =
  39. 39.6 × 98 =
  40. 40.40 × 98 =

Answer key

  1. 171
  2. 95
  3. 1764
  4. 1287
  5. 686
  6. 3920
  7. 126
  8. 76
  9. 594
  10. 54
  11. 686
  12. 116
  13. 406
  14. 343
  15. 396
  16. 261
  17. 294
  18. 343
  19. 2940
  20. 196
  21. 1980
  22. 637
  23. 145
  24. 2744
  25. 174
  26. 27
  27. 990
  28. 87
  29. 637
  30. 152
  31. 1274
  32. 152
  33. 45
  34. 319
  35. 882
  36. 3234
  37. 190
  38. 87
  39. 588
  40. 3920

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