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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 18 · 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. 1.15 × 19 =
  2. 2.15 × 19 =
  3. 3.6 × 9 =
  4. 4.8 × 49 =
  5. 5.11 × 19 =
  6. 6.3 × 19 =
  7. 7.9 × 29 =
  8. 8.36 × 98 =
  9. 9.7 × 9 =
  10. 10.10 × 9 =
  11. 11.14 × 49 =
  12. 12.4 × 98 =
  13. 13.12 × 99 =
  14. 14.9 × 19 =
  15. 15.17 × 99 =
  16. 16.32 × 98 =
  17. 17.13 × 29 =
  18. 18.13 × 9 =
  19. 19.12 × 9 =
  20. 20.10 × 49 =
  21. 21.33 × 99 =
  22. 22.5 × 19 =
  23. 23.12 × 99 =
  24. 24.9 × 99 =
  25. 25.7 × 99 =
  26. 26.13 × 19 =
  27. 27.5 × 99 =
  28. 28.40 × 99 =
  29. 29.12 × 9 =
  30. 30.8 × 49 =
  31. 31.37 × 98 =
  32. 32.13 × 9 =
  33. 33.3 × 19 =
  34. 34.3 × 29 =
  35. 35.5 × 19 =
  36. 36.13 × 9 =
  37. 37.8 × 19 =
  38. 38.5 × 9 =
  39. 39.26 × 99 =
  40. 40.4 × 19 =

Answer key

  1. 285
  2. 285
  3. 54
  4. 392
  5. 209
  6. 57
  7. 261
  8. 3528
  9. 63
  10. 90
  11. 686
  12. 392
  13. 1188
  14. 171
  15. 1683
  16. 3136
  17. 377
  18. 117
  19. 108
  20. 490
  21. 3267
  22. 95
  23. 1188
  24. 891
  25. 693
  26. 247
  27. 495
  28. 3960
  29. 108
  30. 392
  31. 3626
  32. 117
  33. 57
  34. 87
  35. 95
  36. 117
  37. 152
  38. 45
  39. 2574
  40. 76

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