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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 929 · 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. 1.5 × 99 =
  2. 2.5 × 9 =
  3. 3.21 × 99 =
  4. 4.3 × 19 =
  5. 5.15 × 49 =
  6. 6.19 × 99 =
  7. 7.9 × 9 =
  8. 8.3 × 29 =
  9. 9.18 × 98 =
  10. 10.19 × 98 =
  11. 11.7 × 29 =
  12. 12.6 × 99 =
  13. 13.6 × 9 =
  14. 14.12 × 98 =
  15. 15.16 × 99 =
  16. 16.10 × 99 =
  17. 17.5 × 49 =
  18. 18.4 × 19 =
  19. 19.11 × 19 =
  20. 20.39 × 99 =
  21. 21.15 × 9 =
  22. 22.14 × 9 =
  23. 23.15 × 29 =
  24. 24.22 × 99 =
  25. 25.4 × 49 =
  26. 26.3 × 29 =
  27. 27.5 × 29 =
  28. 28.14 × 19 =
  29. 29.8 × 49 =
  30. 30.6 × 9 =
  31. 31.3 × 49 =
  32. 32.14 × 29 =
  33. 33.18 × 99 =
  34. 34.5 × 99 =
  35. 35.11 × 29 =
  36. 36.21 × 99 =
  37. 37.3 × 9 =
  38. 38.5 × 49 =
  39. 39.7 × 29 =
  40. 40.6 × 29 =

Answer key

  1. 495
  2. 45
  3. 2079
  4. 57
  5. 735
  6. 1881
  7. 81
  8. 87
  9. 1764
  10. 1862
  11. 203
  12. 594
  13. 54
  14. 1176
  15. 1584
  16. 990
  17. 245
  18. 76
  19. 209
  20. 3861
  21. 135
  22. 126
  23. 435
  24. 2178
  25. 196
  26. 87
  27. 145
  28. 266
  29. 392
  30. 54
  31. 147
  32. 406
  33. 1782
  34. 495
  35. 319
  36. 2079
  37. 27
  38. 245
  39. 203
  40. 174

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