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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 152 · 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. 1.11 × 9 =
  2. 2.14 × 9 =
  3. 3.12 × 49 =
  4. 4.13 × 9 =
  5. 5.5 × 19 =
  6. 6.4 × 29 =
  7. 7.3 × 99 =
  8. 8.21 × 98 =
  9. 9.6 × 9 =
  10. 10.3 × 9 =
  11. 11.26 × 99 =
  12. 12.13 × 99 =
  13. 13.20 × 99 =
  14. 14.4 × 29 =
  15. 15.4 × 9 =
  16. 16.37 × 99 =
  17. 17.15 × 19 =
  18. 18.15 × 49 =
  19. 19.13 × 19 =
  20. 20.5 × 99 =
  21. 21.6 × 9 =
  22. 22.33 × 99 =
  23. 23.10 × 19 =
  24. 24.4 × 49 =
  25. 25.9 × 29 =
  26. 26.13 × 9 =
  27. 27.3 × 49 =
  28. 28.7 × 29 =
  29. 29.3 × 29 =
  30. 30.19 × 98 =
  31. 31.9 × 19 =
  32. 32.7 × 19 =
  33. 33.37 × 98 =
  34. 34.6 × 19 =
  35. 35.6 × 19 =
  36. 36.10 × 99 =
  37. 37.8 × 19 =
  38. 38.16 × 98 =
  39. 39.29 × 98 =
  40. 40.11 × 29 =

Answer key

  1. 99
  2. 126
  3. 588
  4. 117
  5. 95
  6. 116
  7. 297
  8. 2058
  9. 54
  10. 27
  11. 2574
  12. 1287
  13. 1980
  14. 116
  15. 36
  16. 3663
  17. 285
  18. 735
  19. 247
  20. 495
  21. 54
  22. 3267
  23. 190
  24. 196
  25. 261
  26. 117
  27. 147
  28. 203
  29. 87
  30. 1862
  31. 171
  32. 133
  33. 3626
  34. 114
  35. 114
  36. 990
  37. 152
  38. 1568
  39. 2842
  40. 319

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