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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 757 · 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. 1.10 × 49 =
  2. 2.36 × 99 =
  3. 3.12 × 98 =
  4. 4.5 × 9 =
  5. 5.14 × 29 =
  6. 6.15 × 49 =
  7. 7.5 × 19 =
  8. 8.24 × 98 =
  9. 9.3 × 49 =
  10. 10.13 × 9 =
  11. 11.5 × 29 =
  12. 12.5 × 29 =
  13. 13.7 × 9 =
  14. 14.16 × 98 =
  15. 15.28 × 98 =
  16. 16.7 × 9 =
  17. 17.5 × 98 =
  18. 18.7 × 9 =
  19. 19.8 × 49 =
  20. 20.7 × 19 =
  21. 21.10 × 9 =
  22. 22.16 × 99 =
  23. 23.14 × 49 =
  24. 24.14 × 9 =
  25. 25.3 × 19 =
  26. 26.6 × 19 =
  27. 27.3 × 49 =
  28. 28.17 × 99 =
  29. 29.27 × 98 =
  30. 30.15 × 19 =
  31. 31.3 × 19 =
  32. 32.11 × 19 =
  33. 33.20 × 99 =
  34. 34.9 × 29 =
  35. 35.12 × 9 =
  36. 36.9 × 49 =
  37. 37.13 × 19 =
  38. 38.11 × 19 =
  39. 39.30 × 99 =
  40. 40.14 × 19 =

Answer key

  1. 490
  2. 3564
  3. 1176
  4. 45
  5. 406
  6. 735
  7. 95
  8. 2352
  9. 147
  10. 117
  11. 145
  12. 145
  13. 63
  14. 1568
  15. 2744
  16. 63
  17. 490
  18. 63
  19. 392
  20. 133
  21. 90
  22. 1584
  23. 686
  24. 126
  25. 57
  26. 114
  27. 147
  28. 1683
  29. 2646
  30. 285
  31. 57
  32. 209
  33. 1980
  34. 261
  35. 108
  36. 441
  37. 247
  38. 209
  39. 2970
  40. 266

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