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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 746 · 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. 1.25 × 99 =
  2. 2.3 × 19 =
  3. 3.18 × 98 =
  4. 4.36 × 98 =
  5. 5.26 × 98 =
  6. 6.35 × 99 =
  7. 7.7 × 19 =
  8. 8.5 × 19 =
  9. 9.6 × 29 =
  10. 10.6 × 99 =
  11. 11.9 × 9 =
  12. 12.11 × 9 =
  13. 13.10 × 19 =
  14. 14.5 × 49 =
  15. 15.4 × 98 =
  16. 16.6 × 19 =
  17. 17.3 × 49 =
  18. 18.10 × 98 =
  19. 19.4 × 98 =
  20. 20.9 × 49 =
  21. 21.35 × 99 =
  22. 22.37 × 99 =
  23. 23.4 × 19 =
  24. 24.15 × 9 =
  25. 25.12 × 9 =
  26. 26.6 × 9 =
  27. 27.5 × 9 =
  28. 28.5 × 99 =
  29. 29.28 × 98 =
  30. 30.34 × 99 =
  31. 31.13 × 9 =
  32. 32.7 × 49 =
  33. 33.4 × 49 =
  34. 34.36 × 98 =
  35. 35.16 × 99 =
  36. 36.5 × 99 =
  37. 37.13 × 9 =
  38. 38.12 × 9 =
  39. 39.34 × 99 =
  40. 40.14 × 98 =

Answer key

  1. 2475
  2. 57
  3. 1764
  4. 3528
  5. 2548
  6. 3465
  7. 133
  8. 95
  9. 174
  10. 594
  11. 81
  12. 99
  13. 190
  14. 245
  15. 392
  16. 114
  17. 147
  18. 980
  19. 392
  20. 441
  21. 3465
  22. 3663
  23. 76
  24. 135
  25. 108
  26. 54
  27. 45
  28. 495
  29. 2744
  30. 3366
  31. 117
  32. 343
  33. 196
  34. 3528
  35. 1584
  36. 495
  37. 117
  38. 108
  39. 3366
  40. 1372

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