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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 124 · 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 × 49 =
  3. 3.10 × 9 =
  4. 4.11 × 49 =
  5. 5.10 × 49 =
  6. 6.9 × 98 =
  7. 7.37 × 98 =
  8. 8.25 × 98 =
  9. 9.7 × 49 =
  10. 10.6 × 9 =
  11. 11.3 × 9 =
  12. 12.12 × 9 =
  13. 13.9 × 49 =
  14. 14.40 × 98 =
  15. 15.9 × 9 =
  16. 16.15 × 49 =
  17. 17.8 × 9 =
  18. 18.10 × 99 =
  19. 19.37 × 99 =
  20. 20.8 × 9 =
  21. 21.14 × 49 =
  22. 22.7 × 99 =
  23. 23.12 × 9 =
  24. 24.13 × 49 =
  25. 25.30 × 98 =
  26. 26.3 × 49 =
  27. 27.5 × 29 =
  28. 28.3 × 98 =
  29. 29.15 × 9 =
  30. 30.12 × 49 =
  31. 31.6 × 19 =
  32. 32.14 × 29 =
  33. 33.15 × 19 =
  34. 34.11 × 9 =
  35. 35.12 × 49 =
  36. 36.32 × 99 =
  37. 37.11 × 99 =
  38. 38.7 × 19 =
  39. 39.8 × 29 =
  40. 40.13 × 19 =

Answer key

  1. 2475
  2. 147
  3. 90
  4. 539
  5. 490
  6. 882
  7. 3626
  8. 2450
  9. 343
  10. 54
  11. 27
  12. 108
  13. 441
  14. 3920
  15. 81
  16. 735
  17. 72
  18. 990
  19. 3663
  20. 72
  21. 686
  22. 693
  23. 108
  24. 637
  25. 2940
  26. 147
  27. 145
  28. 294
  29. 135
  30. 588
  31. 114
  32. 406
  33. 285
  34. 99
  35. 588
  36. 3168
  37. 1089
  38. 133
  39. 232
  40. 247

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