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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 137 · 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 × 9 =
  3. 3.20 × 99 =
  4. 4.13 × 98 =
  5. 5.8 × 9 =
  6. 6.8 × 9 =
  7. 7.15 × 99 =
  8. 8.26 × 99 =
  9. 9.14 × 9 =
  10. 10.11 × 29 =
  11. 11.13 × 49 =
  12. 12.3 × 29 =
  13. 13.13 × 49 =
  14. 14.9 × 49 =
  15. 15.4 × 9 =
  16. 16.39 × 99 =
  17. 17.27 × 99 =
  18. 18.6 × 98 =
  19. 19.38 × 99 =
  20. 20.8 × 99 =
  21. 21.11 × 29 =
  22. 22.6 × 19 =
  23. 23.17 × 99 =
  24. 24.10 × 29 =
  25. 25.5 × 19 =
  26. 26.31 × 98 =
  27. 27.4 × 9 =
  28. 28.8 × 9 =
  29. 29.12 × 49 =
  30. 30.3 × 49 =
  31. 31.16 × 99 =
  32. 32.13 × 19 =
  33. 33.8 × 99 =
  34. 34.10 × 99 =
  35. 35.13 × 9 =
  36. 36.8 × 19 =
  37. 37.3 × 98 =
  38. 38.9 × 29 =
  39. 39.10 × 49 =
  40. 40.36 × 98 =

Answer key

  1. 171
  2. 45
  3. 1980
  4. 1274
  5. 72
  6. 72
  7. 1485
  8. 2574
  9. 126
  10. 319
  11. 637
  12. 87
  13. 637
  14. 441
  15. 36
  16. 3861
  17. 2673
  18. 588
  19. 3762
  20. 792
  21. 319
  22. 114
  23. 1683
  24. 290
  25. 95
  26. 3038
  27. 36
  28. 72
  29. 588
  30. 147
  31. 1584
  32. 247
  33. 792
  34. 990
  35. 117
  36. 152
  37. 294
  38. 261
  39. 490
  40. 3528

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