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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 153 · 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. 2.3 × 9 =
  3. 3.13 × 29 =
  4. 4.6 × 29 =
  5. 5.6 × 49 =
  6. 6.27 × 98 =
  7. 7.7 × 9 =
  8. 8.19 × 99 =
  9. 9.15 × 29 =
  10. 10.5 × 49 =
  11. 11.6 × 9 =
  12. 12.9 × 29 =
  13. 13.38 × 98 =
  14. 14.11 × 29 =
  15. 15.15 × 29 =
  16. 16.5 × 19 =
  17. 17.37 × 99 =
  18. 18.12 × 49 =
  19. 19.28 × 99 =
  20. 20.38 × 98 =
  21. 21.13 × 9 =
  22. 22.36 × 99 =
  23. 23.9 × 9 =
  24. 24.9 × 29 =
  25. 25.4 × 19 =
  26. 26.6 × 9 =
  27. 27.21 × 98 =
  28. 28.8 × 49 =
  29. 29.26 × 99 =
  30. 30.10 × 9 =
  31. 31.15 × 19 =
  32. 32.15 × 19 =
  33. 33.5 × 19 =
  34. 34.26 × 99 =
  35. 35.10 × 29 =
  36. 36.6 × 9 =
  37. 37.8 × 19 =
  38. 38.12 × 29 =
  39. 39.12 × 49 =
  40. 40.3 × 9 =

Answer key

  1. 171
  2. 27
  3. 377
  4. 174
  5. 294
  6. 2646
  7. 63
  8. 1881
  9. 435
  10. 245
  11. 54
  12. 261
  13. 3724
  14. 319
  15. 435
  16. 95
  17. 3663
  18. 588
  19. 2772
  20. 3724
  21. 117
  22. 3564
  23. 81
  24. 261
  25. 76
  26. 54
  27. 2058
  28. 392
  29. 2574
  30. 90
  31. 285
  32. 285
  33. 95
  34. 2574
  35. 290
  36. 54
  37. 152
  38. 348
  39. 588
  40. 27

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