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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 631 · 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. 1.10 × 9 =
  2. 2.8 × 29 =
  3. 3.6 × 29 =
  4. 4.10 × 9 =
  5. 5.27 × 99 =
  6. 6.6 × 49 =
  7. 7.10 × 19 =
  8. 8.6 × 29 =
  9. 9.15 × 49 =
  10. 10.10 × 29 =
  11. 11.8 × 19 =
  12. 12.7 × 49 =
  13. 13.18 × 98 =
  14. 14.11 × 49 =
  15. 15.3 × 9 =
  16. 16.9 × 19 =
  17. 17.7 × 9 =
  18. 18.3 × 98 =
  19. 19.34 × 99 =
  20. 20.7 × 9 =
  21. 21.17 × 99 =
  22. 22.8 × 9 =
  23. 23.10 × 98 =
  24. 24.7 × 9 =
  25. 25.10 × 9 =
  26. 26.10 × 49 =
  27. 27.14 × 29 =
  28. 28.7 × 9 =
  29. 29.3 × 9 =
  30. 30.26 × 99 =
  31. 31.8 × 49 =
  32. 32.34 × 99 =
  33. 33.38 × 99 =
  34. 34.15 × 19 =
  35. 35.7 × 19 =
  36. 36.5 × 9 =
  37. 37.13 × 49 =
  38. 38.7 × 9 =
  39. 39.4 × 9 =
  40. 40.15 × 9 =

Answer key

  1. 90
  2. 232
  3. 174
  4. 90
  5. 2673
  6. 294
  7. 190
  8. 174
  9. 735
  10. 290
  11. 152
  12. 343
  13. 1764
  14. 539
  15. 27
  16. 171
  17. 63
  18. 294
  19. 3366
  20. 63
  21. 1683
  22. 72
  23. 980
  24. 63
  25. 90
  26. 490
  27. 406
  28. 63
  29. 27
  30. 2574
  31. 392
  32. 3366
  33. 3762
  34. 285
  35. 133
  36. 45
  37. 637
  38. 63
  39. 36
  40. 135

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