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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 44 · 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. 1.10 × 9 =
  2. 2.14 × 49 =
  3. 3.13 × 29 =
  4. 4.12 × 99 =
  5. 5.19 × 98 =
  6. 6.3 × 29 =
  7. 7.3 × 19 =
  8. 8.32 × 99 =
  9. 9.10 × 29 =
  10. 10.8 × 9 =
  11. 11.14 × 49 =
  12. 12.4 × 9 =
  13. 13.27 × 98 =
  14. 14.4 × 29 =
  15. 15.8 × 99 =
  16. 16.3 × 49 =
  17. 17.13 × 9 =
  18. 18.30 × 99 =
  19. 19.7 × 9 =
  20. 20.18 × 99 =
  21. 21.29 × 98 =
  22. 22.13 × 19 =
  23. 23.7 × 9 =
  24. 24.6 × 9 =
  25. 25.14 × 49 =
  26. 26.20 × 99 =
  27. 27.7 × 49 =
  28. 28.7 × 29 =
  29. 29.6 × 98 =
  30. 30.9 × 29 =
  31. 31.5 × 9 =
  32. 32.15 × 29 =
  33. 33.17 × 99 =
  34. 34.5 × 29 =
  35. 35.14 × 29 =
  36. 36.10 × 99 =
  37. 37.18 × 99 =
  38. 38.3 × 49 =
  39. 39.33 × 99 =
  40. 40.20 × 99 =

Answer key

  1. 90
  2. 686
  3. 377
  4. 1188
  5. 1862
  6. 87
  7. 57
  8. 3168
  9. 290
  10. 72
  11. 686
  12. 36
  13. 2646
  14. 116
  15. 792
  16. 147
  17. 117
  18. 2970
  19. 63
  20. 1782
  21. 2842
  22. 247
  23. 63
  24. 54
  25. 686
  26. 1980
  27. 343
  28. 203
  29. 588
  30. 261
  31. 45
  32. 435
  33. 1683
  34. 145
  35. 406
  36. 990
  37. 1782
  38. 147
  39. 3267
  40. 1980

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