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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 630 · 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. 1.10 × 19 =
  2. 2.26 × 99 =
  3. 3.8 × 9 =
  4. 4.17 × 99 =
  5. 5.13 × 98 =
  6. 6.5 × 9 =
  7. 7.5 × 9 =
  8. 8.8 × 19 =
  9. 9.31 × 99 =
  10. 10.6 × 49 =
  11. 11.14 × 99 =
  12. 12.10 × 49 =
  13. 13.16 × 99 =
  14. 14.8 × 49 =
  15. 15.5 × 98 =
  16. 16.9 × 9 =
  17. 17.14 × 49 =
  18. 18.8 × 19 =
  19. 19.3 × 49 =
  20. 20.3 × 9 =
  21. 21.4 × 49 =
  22. 22.4 × 19 =
  23. 23.13 × 99 =
  24. 24.14 × 9 =
  25. 25.3 × 19 =
  26. 26.36 × 98 =
  27. 27.14 × 99 =
  28. 28.11 × 9 =
  29. 29.14 × 19 =
  30. 30.9 × 29 =
  31. 31.15 × 19 =
  32. 32.15 × 19 =
  33. 33.8 × 9 =
  34. 34.10 × 9 =
  35. 35.6 × 99 =
  36. 36.9 × 29 =
  37. 37.9 × 9 =
  38. 38.3 × 9 =
  39. 39.8 × 9 =
  40. 40.39 × 98 =

Answer key

  1. 190
  2. 2574
  3. 72
  4. 1683
  5. 1274
  6. 45
  7. 45
  8. 152
  9. 3069
  10. 294
  11. 1386
  12. 490
  13. 1584
  14. 392
  15. 490
  16. 81
  17. 686
  18. 152
  19. 147
  20. 27
  21. 196
  22. 76
  23. 1287
  24. 126
  25. 57
  26. 3528
  27. 1386
  28. 99
  29. 266
  30. 261
  31. 285
  32. 285
  33. 72
  34. 90
  35. 594
  36. 261
  37. 81
  38. 27
  39. 72
  40. 3822

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