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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 331 · 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. 1.13 × 19 =
  2. 2.9 × 29 =
  3. 3.7 × 19 =
  4. 4.19 × 98 =
  5. 5.7 × 9 =
  6. 6.9 × 19 =
  7. 7.8 × 49 =
  8. 8.4 × 29 =
  9. 9.6 × 49 =
  10. 10.4 × 9 =
  11. 11.7 × 9 =
  12. 12.35 × 99 =
  13. 13.8 × 99 =
  14. 14.33 × 98 =
  15. 15.15 × 19 =
  16. 16.3 × 9 =
  17. 17.13 × 9 =
  18. 18.14 × 29 =
  19. 19.4 × 9 =
  20. 20.10 × 19 =
  21. 21.24 × 98 =
  22. 22.32 × 98 =
  23. 23.7 × 49 =
  24. 24.6 × 19 =
  25. 25.22 × 99 =
  26. 26.3 × 49 =
  27. 27.3 × 99 =
  28. 28.6 × 19 =
  29. 29.11 × 19 =
  30. 30.14 × 9 =
  31. 31.3 × 9 =
  32. 32.3 × 29 =
  33. 33.3 × 19 =
  34. 34.6 × 9 =
  35. 35.9 × 19 =
  36. 36.7 × 9 =
  37. 37.13 × 19 =
  38. 38.14 × 9 =
  39. 39.6 × 29 =
  40. 40.4 × 9 =

Answer key

  1. 247
  2. 261
  3. 133
  4. 1862
  5. 63
  6. 171
  7. 392
  8. 116
  9. 294
  10. 36
  11. 63
  12. 3465
  13. 792
  14. 3234
  15. 285
  16. 27
  17. 117
  18. 406
  19. 36
  20. 190
  21. 2352
  22. 3136
  23. 343
  24. 114
  25. 2178
  26. 147
  27. 297
  28. 114
  29. 209
  30. 126
  31. 27
  32. 87
  33. 57
  34. 54
  35. 171
  36. 63
  37. 247
  38. 126
  39. 174
  40. 36

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