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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 871 · 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 × 49 =
  2. 2.3 × 49 =
  3. 3.28 × 99 =
  4. 4.3 × 98 =
  5. 5.5 × 29 =
  6. 6.13 × 9 =
  7. 7.3 × 29 =
  8. 8.38 × 99 =
  9. 9.4 × 19 =
  10. 10.10 × 19 =
  11. 11.13 × 49 =
  12. 12.9 × 29 =
  13. 13.9 × 49 =
  14. 14.20 × 98 =
  15. 15.4 × 9 =
  16. 16.4 × 19 =
  17. 17.8 × 19 =
  18. 18.4 × 29 =
  19. 19.11 × 49 =
  20. 20.10 × 49 =
  21. 21.14 × 49 =
  22. 22.13 × 29 =
  23. 23.4 × 9 =
  24. 24.15 × 19 =
  25. 25.4 × 49 =
  26. 26.13 × 99 =
  27. 27.32 × 99 =
  28. 28.12 × 9 =
  29. 29.15 × 19 =
  30. 30.23 × 99 =
  31. 31.5 × 19 =
  32. 32.13 × 99 =
  33. 33.11 × 19 =
  34. 34.14 × 19 =
  35. 35.25 × 99 =
  36. 36.6 × 99 =
  37. 37.9 × 99 =
  38. 38.10 × 29 =
  39. 39.3 × 9 =
  40. 40.39 × 98 =

Answer key

  1. 441
  2. 147
  3. 2772
  4. 294
  5. 145
  6. 117
  7. 87
  8. 3762
  9. 76
  10. 190
  11. 637
  12. 261
  13. 441
  14. 1960
  15. 36
  16. 76
  17. 152
  18. 116
  19. 539
  20. 490
  21. 686
  22. 377
  23. 36
  24. 285
  25. 196
  26. 1287
  27. 3168
  28. 108
  29. 285
  30. 2277
  31. 95
  32. 1287
  33. 209
  34. 266
  35. 2475
  36. 594
  37. 891
  38. 290
  39. 27
  40. 3822

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