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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 661 · 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 × 98 =
  2. 2.14 × 19 =
  3. 3.9 × 29 =
  4. 4.26 × 98 =
  5. 5.9 × 19 =
  6. 6.7 × 19 =
  7. 7.12 × 9 =
  8. 8.3 × 49 =
  9. 9.10 × 9 =
  10. 10.10 × 19 =
  11. 11.14 × 49 =
  12. 12.14 × 49 =
  13. 13.6 × 49 =
  14. 14.10 × 9 =
  15. 15.12 × 49 =
  16. 16.4 × 49 =
  17. 17.8 × 19 =
  18. 18.8 × 98 =
  19. 19.7 × 29 =
  20. 20.8 × 99 =
  21. 21.6 × 29 =
  22. 22.34 × 98 =
  23. 23.11 × 99 =
  24. 24.23 × 98 =
  25. 25.11 × 19 =
  26. 26.11 × 19 =
  27. 27.18 × 98 =
  28. 28.6 × 9 =
  29. 29.9 × 9 =
  30. 30.19 × 99 =
  31. 31.5 × 99 =
  32. 32.15 × 9 =
  33. 33.3 × 19 =
  34. 34.4 × 19 =
  35. 35.38 × 98 =
  36. 36.7 × 49 =
  37. 37.11 × 19 =
  38. 38.40 × 98 =
  39. 39.7 × 19 =
  40. 40.8 × 19 =

Answer key

  1. 294
  2. 266
  3. 261
  4. 2548
  5. 171
  6. 133
  7. 108
  8. 147
  9. 90
  10. 190
  11. 686
  12. 686
  13. 294
  14. 90
  15. 588
  16. 196
  17. 152
  18. 784
  19. 203
  20. 792
  21. 174
  22. 3332
  23. 1089
  24. 2254
  25. 209
  26. 209
  27. 1764
  28. 54
  29. 81
  30. 1881
  31. 495
  32. 135
  33. 57
  34. 76
  35. 3724
  36. 343
  37. 209
  38. 3920
  39. 133
  40. 152

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