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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 362 · 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. 1.29 × 98 =
  2. 2.10 × 49 =
  3. 3.4 × 19 =
  4. 4.8 × 19 =
  5. 5.30 × 99 =
  6. 6.11 × 98 =
  7. 7.3 × 9 =
  8. 8.3 × 29 =
  9. 9.4 × 19 =
  10. 10.21 × 99 =
  11. 11.7 × 9 =
  12. 12.34 × 99 =
  13. 13.9 × 29 =
  14. 14.5 × 99 =
  15. 15.12 × 49 =
  16. 16.9 × 29 =
  17. 17.13 × 19 =
  18. 18.30 × 99 =
  19. 19.7 × 19 =
  20. 20.3 × 19 =
  21. 21.9 × 9 =
  22. 22.14 × 19 =
  23. 23.25 × 98 =
  24. 24.6 × 9 =
  25. 25.4 × 9 =
  26. 26.4 × 9 =
  27. 27.11 × 19 =
  28. 28.7 × 49 =
  29. 29.33 × 98 =
  30. 30.12 × 99 =
  31. 31.26 × 98 =
  32. 32.14 × 29 =
  33. 33.9 × 9 =
  34. 34.4 × 19 =
  35. 35.9 × 29 =
  36. 36.14 × 49 =
  37. 37.26 × 99 =
  38. 38.23 × 98 =
  39. 39.12 × 49 =
  40. 40.9 × 9 =

Answer key

  1. 2842
  2. 490
  3. 76
  4. 152
  5. 2970
  6. 1078
  7. 27
  8. 87
  9. 76
  10. 2079
  11. 63
  12. 3366
  13. 261
  14. 495
  15. 588
  16. 261
  17. 247
  18. 2970
  19. 133
  20. 57
  21. 81
  22. 266
  23. 2450
  24. 54
  25. 36
  26. 36
  27. 209
  28. 343
  29. 3234
  30. 1188
  31. 2548
  32. 406
  33. 81
  34. 76
  35. 261
  36. 686
  37. 2574
  38. 2254
  39. 588
  40. 81

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