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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 412 · 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. 1.14 × 19 =
  2. 2.13 × 9 =
  3. 3.9 × 99 =
  4. 4.5 × 29 =
  5. 5.10 × 29 =
  6. 6.39 × 99 =
  7. 7.21 × 99 =
  8. 8.5 × 9 =
  9. 9.6 × 9 =
  10. 10.37 × 98 =
  11. 11.28 × 99 =
  12. 12.8 × 98 =
  13. 13.5 × 19 =
  14. 14.28 × 98 =
  15. 15.5 × 9 =
  16. 16.28 × 99 =
  17. 17.5 × 98 =
  18. 18.26 × 99 =
  19. 19.3 × 9 =
  20. 20.10 × 29 =
  21. 21.9 × 19 =
  22. 22.9 × 19 =
  23. 23.3 × 98 =
  24. 24.25 × 98 =
  25. 25.10 × 29 =
  26. 26.12 × 19 =
  27. 27.10 × 9 =
  28. 28.4 × 98 =
  29. 29.11 × 19 =
  30. 30.10 × 49 =
  31. 31.18 × 98 =
  32. 32.9 × 29 =
  33. 33.9 × 98 =
  34. 34.6 × 29 =
  35. 35.34 × 98 =
  36. 36.7 × 19 =
  37. 37.10 × 29 =
  38. 38.14 × 19 =
  39. 39.3 × 9 =
  40. 40.10 × 19 =

Answer key

  1. 266
  2. 117
  3. 891
  4. 145
  5. 290
  6. 3861
  7. 2079
  8. 45
  9. 54
  10. 3626
  11. 2772
  12. 784
  13. 95
  14. 2744
  15. 45
  16. 2772
  17. 490
  18. 2574
  19. 27
  20. 290
  21. 171
  22. 171
  23. 294
  24. 2450
  25. 290
  26. 228
  27. 90
  28. 392
  29. 209
  30. 490
  31. 1764
  32. 261
  33. 882
  34. 174
  35. 3332
  36. 133
  37. 290
  38. 266
  39. 27
  40. 190

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