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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 790 · 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. 1.15 × 29 =
  2. 2.10 × 19 =
  3. 3.12 × 98 =
  4. 4.12 × 9 =
  5. 5.26 × 99 =
  6. 6.10 × 99 =
  7. 7.4 × 9 =
  8. 8.12 × 49 =
  9. 9.12 × 98 =
  10. 10.8 × 49 =
  11. 11.7 × 98 =
  12. 12.19 × 99 =
  13. 13.17 × 98 =
  14. 14.31 × 98 =
  15. 15.14 × 29 =
  16. 16.18 × 98 =
  17. 17.18 × 99 =
  18. 18.12 × 19 =
  19. 19.9 × 49 =
  20. 20.35 × 99 =
  21. 21.37 × 99 =
  22. 22.13 × 49 =
  23. 23.10 × 9 =
  24. 24.29 × 99 =
  25. 25.8 × 29 =
  26. 26.12 × 49 =
  27. 27.7 × 19 =
  28. 28.4 × 9 =
  29. 29.33 × 99 =
  30. 30.3 × 9 =
  31. 31.4 × 19 =
  32. 32.10 × 9 =
  33. 33.10 × 29 =
  34. 34.5 × 9 =
  35. 35.4 × 49 =
  36. 36.4 × 9 =
  37. 37.13 × 9 =
  38. 38.28 × 98 =
  39. 39.14 × 9 =
  40. 40.9 × 9 =

Answer key

  1. 435
  2. 190
  3. 1176
  4. 108
  5. 2574
  6. 990
  7. 36
  8. 588
  9. 1176
  10. 392
  11. 686
  12. 1881
  13. 1666
  14. 3038
  15. 406
  16. 1764
  17. 1782
  18. 228
  19. 441
  20. 3465
  21. 3663
  22. 637
  23. 90
  24. 2871
  25. 232
  26. 588
  27. 133
  28. 36
  29. 3267
  30. 27
  31. 76
  32. 90
  33. 290
  34. 45
  35. 196
  36. 36
  37. 117
  38. 2744
  39. 126
  40. 81

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