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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 879 · 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. 1.12 × 49 =
  2. 2.21 × 98 =
  3. 3.12 × 9 =
  4. 4.4 × 19 =
  5. 5.13 × 49 =
  6. 6.12 × 98 =
  7. 7.20 × 98 =
  8. 8.9 × 49 =
  9. 9.14 × 19 =
  10. 10.4 × 19 =
  11. 11.10 × 19 =
  12. 12.4 × 9 =
  13. 13.16 × 99 =
  14. 14.15 × 49 =
  15. 15.23 × 98 =
  16. 16.10 × 9 =
  17. 17.6 × 19 =
  18. 18.5 × 19 =
  19. 19.5 × 29 =
  20. 20.31 × 99 =
  21. 21.4 × 9 =
  22. 22.8 × 98 =
  23. 23.26 × 99 =
  24. 24.7 × 99 =
  25. 25.3 × 29 =
  26. 26.3 × 19 =
  27. 27.13 × 29 =
  28. 28.3 × 99 =
  29. 29.6 × 19 =
  30. 30.4 × 98 =
  31. 31.7 × 9 =
  32. 32.15 × 19 =
  33. 33.12 × 49 =
  34. 34.12 × 29 =
  35. 35.7 × 98 =
  36. 36.18 × 99 =
  37. 37.25 × 99 =
  38. 38.12 × 98 =
  39. 39.3 × 29 =
  40. 40.6 × 19 =

Answer key

  1. 588
  2. 2058
  3. 108
  4. 76
  5. 637
  6. 1176
  7. 1960
  8. 441
  9. 266
  10. 76
  11. 190
  12. 36
  13. 1584
  14. 735
  15. 2254
  16. 90
  17. 114
  18. 95
  19. 145
  20. 3069
  21. 36
  22. 784
  23. 2574
  24. 693
  25. 87
  26. 57
  27. 377
  28. 297
  29. 114
  30. 392
  31. 63
  32. 285
  33. 588
  34. 348
  35. 686
  36. 1782
  37. 2475
  38. 1176
  39. 87
  40. 114

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