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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 675 · 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. 1.39 × 98 =
  2. 2.7 × 49 =
  3. 3.5 × 99 =
  4. 4.15 × 29 =
  5. 5.31 × 99 =
  6. 6.14 × 29 =
  7. 7.11 × 49 =
  8. 8.7 × 9 =
  9. 9.9 × 49 =
  10. 10.4 × 29 =
  11. 11.21 × 99 =
  12. 12.11 × 29 =
  13. 13.6 × 9 =
  14. 14.14 × 29 =
  15. 15.7 × 49 =
  16. 16.4 × 9 =
  17. 17.35 × 99 =
  18. 18.7 × 19 =
  19. 19.15 × 9 =
  20. 20.10 × 99 =
  21. 21.4 × 98 =
  22. 22.5 × 29 =
  23. 23.35 × 99 =
  24. 24.11 × 29 =
  25. 25.15 × 9 =
  26. 26.12 × 49 =
  27. 27.3 × 49 =
  28. 28.6 × 99 =
  29. 29.9 × 19 =
  30. 30.15 × 9 =
  31. 31.12 × 99 =
  32. 32.5 × 9 =
  33. 33.26 × 99 =
  34. 34.13 × 99 =
  35. 35.12 × 19 =
  36. 36.37 × 98 =
  37. 37.40 × 98 =
  38. 38.11 × 29 =
  39. 39.26 × 99 =
  40. 40.8 × 9 =

Answer key

  1. 3822
  2. 343
  3. 495
  4. 435
  5. 3069
  6. 406
  7. 539
  8. 63
  9. 441
  10. 116
  11. 2079
  12. 319
  13. 54
  14. 406
  15. 343
  16. 36
  17. 3465
  18. 133
  19. 135
  20. 990
  21. 392
  22. 145
  23. 3465
  24. 319
  25. 135
  26. 588
  27. 147
  28. 594
  29. 171
  30. 135
  31. 1188
  32. 45
  33. 2574
  34. 1287
  35. 228
  36. 3626
  37. 3920
  38. 319
  39. 2574
  40. 72

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