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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 109 · 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. 1.4 × 49 =
  2. 2.10 × 19 =
  3. 3.10 × 9 =
  4. 4.14 × 19 =
  5. 5.6 × 29 =
  6. 6.4 × 49 =
  7. 7.9 × 99 =
  8. 8.3 × 49 =
  9. 9.37 × 98 =
  10. 10.8 × 99 =
  11. 11.24 × 99 =
  12. 12.11 × 49 =
  13. 13.7 × 29 =
  14. 14.11 × 98 =
  15. 15.3 × 29 =
  16. 16.19 × 99 =
  17. 17.3 × 29 =
  18. 18.15 × 29 =
  19. 19.13 × 9 =
  20. 20.10 × 9 =
  21. 21.3 × 49 =
  22. 22.8 × 29 =
  23. 23.38 × 99 =
  24. 24.13 × 9 =
  25. 25.4 × 19 =
  26. 26.4 × 99 =
  27. 27.30 × 98 =
  28. 28.39 × 99 =
  29. 29.15 × 99 =
  30. 30.10 × 29 =
  31. 31.13 × 29 =
  32. 32.12 × 49 =
  33. 33.12 × 9 =
  34. 34.7 × 98 =
  35. 35.36 × 99 =
  36. 36.6 × 98 =
  37. 37.13 × 9 =
  38. 38.12 × 99 =
  39. 39.7 × 9 =
  40. 40.10 × 49 =

Answer key

  1. 196
  2. 190
  3. 90
  4. 266
  5. 174
  6. 196
  7. 891
  8. 147
  9. 3626
  10. 792
  11. 2376
  12. 539
  13. 203
  14. 1078
  15. 87
  16. 1881
  17. 87
  18. 435
  19. 117
  20. 90
  21. 147
  22. 232
  23. 3762
  24. 117
  25. 76
  26. 396
  27. 2940
  28. 3861
  29. 1485
  30. 290
  31. 377
  32. 588
  33. 108
  34. 686
  35. 3564
  36. 588
  37. 117
  38. 1188
  39. 63
  40. 490

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