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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 25 · 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. 1.7 × 9 =
  2. 2.15 × 29 =
  3. 3.29 × 99 =
  4. 4.7 × 49 =
  5. 5.15 × 49 =
  6. 6.9 × 19 =
  7. 7.4 × 19 =
  8. 8.5 × 49 =
  9. 9.13 × 19 =
  10. 10.7 × 98 =
  11. 11.4 × 29 =
  12. 12.15 × 99 =
  13. 13.7 × 9 =
  14. 14.15 × 98 =
  15. 15.8 × 29 =
  16. 16.13 × 19 =
  17. 17.9 × 29 =
  18. 18.17 × 99 =
  19. 19.13 × 19 =
  20. 20.3 × 29 =
  21. 21.3 × 19 =
  22. 22.3 × 49 =
  23. 23.11 × 49 =
  24. 24.10 × 98 =
  25. 25.10 × 9 =
  26. 26.6 × 29 =
  27. 27.4 × 98 =
  28. 28.40 × 98 =
  29. 29.6 × 9 =
  30. 30.5 × 49 =
  31. 31.10 × 19 =
  32. 32.9 × 98 =
  33. 33.11 × 29 =
  34. 34.6 × 19 =
  35. 35.11 × 49 =
  36. 36.3 × 9 =
  37. 37.12 × 49 =
  38. 38.9 × 99 =
  39. 39.4 × 9 =
  40. 40.10 × 98 =

Answer key

  1. 63
  2. 435
  3. 2871
  4. 343
  5. 735
  6. 171
  7. 76
  8. 245
  9. 247
  10. 686
  11. 116
  12. 1485
  13. 63
  14. 1470
  15. 232
  16. 247
  17. 261
  18. 1683
  19. 247
  20. 87
  21. 57
  22. 147
  23. 539
  24. 980
  25. 90
  26. 174
  27. 392
  28. 3920
  29. 54
  30. 245
  31. 190
  32. 882
  33. 319
  34. 114
  35. 539
  36. 27
  37. 588
  38. 891
  39. 36
  40. 980

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