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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 483 · 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. 1.9 × 9 =
  2. 2.8 × 29 =
  3. 3.33 × 98 =
  4. 4.36 × 99 =
  5. 5.8 × 99 =
  6. 6.28 × 99 =
  7. 7.15 × 9 =
  8. 8.9 × 49 =
  9. 9.18 × 99 =
  10. 10.15 × 9 =
  11. 11.4 × 9 =
  12. 12.4 × 9 =
  13. 13.33 × 99 =
  14. 14.5 × 19 =
  15. 15.12 × 9 =
  16. 16.15 × 29 =
  17. 17.23 × 99 =
  18. 18.8 × 9 =
  19. 19.13 × 9 =
  20. 20.9 × 29 =
  21. 21.6 × 29 =
  22. 22.3 × 49 =
  23. 23.11 × 9 =
  24. 24.29 × 99 =
  25. 25.15 × 49 =
  26. 26.15 × 29 =
  27. 27.7 × 9 =
  28. 28.4 × 9 =
  29. 29.9 × 19 =
  30. 30.4 × 49 =
  31. 31.15 × 9 =
  32. 32.13 × 19 =
  33. 33.8 × 9 =
  34. 34.36 × 98 =
  35. 35.11 × 9 =
  36. 36.21 × 99 =
  37. 37.10 × 19 =
  38. 38.3 × 19 =
  39. 39.11 × 19 =
  40. 40.14 × 29 =

Answer key

  1. 81
  2. 232
  3. 3234
  4. 3564
  5. 792
  6. 2772
  7. 135
  8. 441
  9. 1782
  10. 135
  11. 36
  12. 36
  13. 3267
  14. 95
  15. 108
  16. 435
  17. 2277
  18. 72
  19. 117
  20. 261
  21. 174
  22. 147
  23. 99
  24. 2871
  25. 735
  26. 435
  27. 63
  28. 36
  29. 171
  30. 196
  31. 135
  32. 247
  33. 72
  34. 3528
  35. 99
  36. 2079
  37. 190
  38. 57
  39. 209
  40. 406

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