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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 842 · 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. 1.8 × 49 =
  2. 2.14 × 49 =
  3. 3.8 × 29 =
  4. 4.14 × 99 =
  5. 5.4 × 19 =
  6. 6.13 × 29 =
  7. 7.35 × 98 =
  8. 8.5 × 29 =
  9. 9.18 × 98 =
  10. 10.7 × 9 =
  11. 11.14 × 19 =
  12. 12.37 × 99 =
  13. 13.7 × 98 =
  14. 14.8 × 99 =
  15. 15.10 × 29 =
  16. 16.14 × 29 =
  17. 17.5 × 9 =
  18. 18.39 × 98 =
  19. 19.13 × 98 =
  20. 20.3 × 9 =
  21. 21.7 × 49 =
  22. 22.5 × 19 =
  23. 23.11 × 99 =
  24. 24.12 × 9 =
  25. 25.29 × 99 =
  26. 26.10 × 29 =
  27. 27.4 × 19 =
  28. 28.14 × 19 =
  29. 29.14 × 19 =
  30. 30.3 × 19 =
  31. 31.7 × 9 =
  32. 32.33 × 98 =
  33. 33.9 × 49 =
  34. 34.8 × 9 =
  35. 35.8 × 49 =
  36. 36.28 × 99 =
  37. 37.4 × 98 =
  38. 38.32 × 99 =
  39. 39.11 × 19 =
  40. 40.11 × 19 =

Answer key

  1. 392
  2. 686
  3. 232
  4. 1386
  5. 76
  6. 377
  7. 3430
  8. 145
  9. 1764
  10. 63
  11. 266
  12. 3663
  13. 686
  14. 792
  15. 290
  16. 406
  17. 45
  18. 3822
  19. 1274
  20. 27
  21. 343
  22. 95
  23. 1089
  24. 108
  25. 2871
  26. 290
  27. 76
  28. 266
  29. 266
  30. 57
  31. 63
  32. 3234
  33. 441
  34. 72
  35. 392
  36. 2772
  37. 392
  38. 3168
  39. 209
  40. 209

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