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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 522 · 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. 1.9 × 19 =
  2. 2.14 × 49 =
  3. 3.40 × 98 =
  4. 4.6 × 9 =
  5. 5.21 × 99 =
  6. 6.3 × 49 =
  7. 7.28 × 99 =
  8. 8.9 × 9 =
  9. 9.13 × 49 =
  10. 10.14 × 19 =
  11. 11.7 × 19 =
  12. 12.7 × 19 =
  13. 13.12 × 19 =
  14. 14.11 × 29 =
  15. 15.3 × 9 =
  16. 16.7 × 9 =
  17. 17.5 × 98 =
  18. 18.38 × 99 =
  19. 19.3 × 29 =
  20. 20.10 × 49 =
  21. 21.29 × 99 =
  22. 22.11 × 19 =
  23. 23.5 × 49 =
  24. 24.13 × 9 =
  25. 25.5 × 49 =
  26. 26.11 × 49 =
  27. 27.10 × 9 =
  28. 28.3 × 9 =
  29. 29.10 × 9 =
  30. 30.8 × 19 =
  31. 31.28 × 99 =
  32. 32.6 × 99 =
  33. 33.10 × 19 =
  34. 34.14 × 19 =
  35. 35.13 × 19 =
  36. 36.13 × 9 =
  37. 37.31 × 99 =
  38. 38.11 × 9 =
  39. 39.29 × 99 =
  40. 40.40 × 98 =

Answer key

  1. 171
  2. 686
  3. 3920
  4. 54
  5. 2079
  6. 147
  7. 2772
  8. 81
  9. 637
  10. 266
  11. 133
  12. 133
  13. 228
  14. 319
  15. 27
  16. 63
  17. 490
  18. 3762
  19. 87
  20. 490
  21. 2871
  22. 209
  23. 245
  24. 117
  25. 245
  26. 539
  27. 90
  28. 27
  29. 90
  30. 152
  31. 2772
  32. 594
  33. 190
  34. 266
  35. 247
  36. 117
  37. 3069
  38. 99
  39. 2871
  40. 3920

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