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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 458 · 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. 1.13 × 19 =
  2. 2.13 × 29 =
  3. 3.9 × 9 =
  4. 4.40 × 98 =
  5. 5.38 × 98 =
  6. 6.13 × 29 =
  7. 7.6 × 19 =
  8. 8.5 × 49 =
  9. 9.8 × 49 =
  10. 10.12 × 99 =
  11. 11.9 × 49 =
  12. 12.40 × 98 =
  13. 13.4 × 19 =
  14. 14.10 × 29 =
  15. 15.3 × 98 =
  16. 16.12 × 9 =
  17. 17.7 × 19 =
  18. 18.26 × 98 =
  19. 19.5 × 98 =
  20. 20.10 × 9 =
  21. 21.35 × 98 =
  22. 22.15 × 29 =
  23. 23.4 × 9 =
  24. 24.13 × 9 =
  25. 25.13 × 9 =
  26. 26.3 × 49 =
  27. 27.18 × 98 =
  28. 28.6 × 99 =
  29. 29.21 × 99 =
  30. 30.4 × 19 =
  31. 31.37 × 99 =
  32. 32.14 × 49 =
  33. 33.5 × 19 =
  34. 34.14 × 49 =
  35. 35.3 × 49 =
  36. 36.33 × 98 =
  37. 37.26 × 98 =
  38. 38.29 × 98 =
  39. 39.8 × 19 =
  40. 40.36 × 98 =

Answer key

  1. 247
  2. 377
  3. 81
  4. 3920
  5. 3724
  6. 377
  7. 114
  8. 245
  9. 392
  10. 1188
  11. 441
  12. 3920
  13. 76
  14. 290
  15. 294
  16. 108
  17. 133
  18. 2548
  19. 490
  20. 90
  21. 3430
  22. 435
  23. 36
  24. 117
  25. 117
  26. 147
  27. 1764
  28. 594
  29. 2079
  30. 76
  31. 3663
  32. 686
  33. 95
  34. 686
  35. 147
  36. 3234
  37. 2548
  38. 2842
  39. 152
  40. 3528

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