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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 990 · 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. 1.29 × 99 =
  2. 2.11 × 49 =
  3. 3.6 × 49 =
  4. 4.7 × 98 =
  5. 5.6 × 49 =
  6. 6.3 × 49 =
  7. 7.3 × 98 =
  8. 8.11 × 19 =
  9. 9.14 × 19 =
  10. 10.28 × 98 =
  11. 11.10 × 29 =
  12. 12.14 × 9 =
  13. 13.10 × 49 =
  14. 14.6 × 99 =
  15. 15.15 × 9 =
  16. 16.13 × 99 =
  17. 17.3 × 19 =
  18. 18.8 × 19 =
  19. 19.10 × 19 =
  20. 20.3 × 29 =
  21. 21.5 × 19 =
  22. 22.11 × 19 =
  23. 23.35 × 99 =
  24. 24.12 × 9 =
  25. 25.6 × 9 =
  26. 26.33 × 99 =
  27. 27.12 × 98 =
  28. 28.17 × 99 =
  29. 29.8 × 98 =
  30. 30.13 × 49 =
  31. 31.19 × 99 =
  32. 32.37 × 99 =
  33. 33.23 × 99 =
  34. 34.26 × 99 =
  35. 35.5 × 49 =
  36. 36.4 × 49 =
  37. 37.11 × 19 =
  38. 38.9 × 99 =
  39. 39.5 × 99 =
  40. 40.12 × 9 =

Answer key

  1. 2871
  2. 539
  3. 294
  4. 686
  5. 294
  6. 147
  7. 294
  8. 209
  9. 266
  10. 2744
  11. 290
  12. 126
  13. 490
  14. 594
  15. 135
  16. 1287
  17. 57
  18. 152
  19. 190
  20. 87
  21. 95
  22. 209
  23. 3465
  24. 108
  25. 54
  26. 3267
  27. 1176
  28. 1683
  29. 784
  30. 637
  31. 1881
  32. 3663
  33. 2277
  34. 2574
  35. 245
  36. 196
  37. 209
  38. 891
  39. 495
  40. 108

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