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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 168 · 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. 1.3 × 19 =
  2. 2.35 × 98 =
  3. 3.26 × 99 =
  4. 4.39 × 99 =
  5. 5.30 × 99 =
  6. 6.3 × 9 =
  7. 7.9 × 98 =
  8. 8.13 × 9 =
  9. 9.13 × 19 =
  10. 10.24 × 99 =
  11. 11.11 × 19 =
  12. 12.11 × 9 =
  13. 13.3 × 19 =
  14. 14.13 × 19 =
  15. 15.11 × 49 =
  16. 16.18 × 98 =
  17. 17.4 × 49 =
  18. 18.4 × 49 =
  19. 19.4 × 29 =
  20. 20.14 × 49 =
  21. 21.4 × 98 =
  22. 22.21 × 98 =
  23. 23.3 × 98 =
  24. 24.11 × 19 =
  25. 25.3 × 29 =
  26. 26.5 × 49 =
  27. 27.34 × 99 =
  28. 28.11 × 9 =
  29. 29.8 × 9 =
  30. 30.4 × 99 =
  31. 31.13 × 99 =
  32. 32.4 × 49 =
  33. 33.13 × 49 =
  34. 34.11 × 49 =
  35. 35.11 × 49 =
  36. 36.4 × 9 =
  37. 37.5 × 9 =
  38. 38.9 × 9 =
  39. 39.4 × 98 =
  40. 40.6 × 19 =

Answer key

  1. 57
  2. 3430
  3. 2574
  4. 3861
  5. 2970
  6. 27
  7. 882
  8. 117
  9. 247
  10. 2376
  11. 209
  12. 99
  13. 57
  14. 247
  15. 539
  16. 1764
  17. 196
  18. 196
  19. 116
  20. 686
  21. 392
  22. 2058
  23. 294
  24. 209
  25. 87
  26. 245
  27. 3366
  28. 99
  29. 72
  30. 396
  31. 1287
  32. 196
  33. 637
  34. 539
  35. 539
  36. 36
  37. 45
  38. 81
  39. 392
  40. 114

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