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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 321 · 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 × 99 =
  2. 2.6 × 98 =
  3. 3.12 × 19 =
  4. 4.8 × 19 =
  5. 5.5 × 49 =
  6. 6.10 × 98 =
  7. 7.4 × 19 =
  8. 8.28 × 98 =
  9. 9.11 × 9 =
  10. 10.7 × 49 =
  11. 11.25 × 98 =
  12. 12.33 × 98 =
  13. 13.7 × 29 =
  14. 14.9 × 9 =
  15. 15.27 × 98 =
  16. 16.24 × 99 =
  17. 17.37 × 98 =
  18. 18.6 × 9 =
  19. 19.4 × 19 =
  20. 20.14 × 19 =
  21. 21.4 × 9 =
  22. 22.9 × 98 =
  23. 23.11 × 49 =
  24. 24.5 × 19 =
  25. 25.9 × 49 =
  26. 26.36 × 99 =
  27. 27.8 × 99 =
  28. 28.29 × 99 =
  29. 29.3 × 9 =
  30. 30.12 × 19 =
  31. 31.15 × 9 =
  32. 32.12 × 19 =
  33. 33.10 × 19 =
  34. 34.6 × 9 =
  35. 35.14 × 29 =
  36. 36.8 × 19 =
  37. 37.5 × 49 =
  38. 38.19 × 99 =
  39. 39.5 × 9 =
  40. 40.38 × 99 =

Answer key

  1. 990
  2. 588
  3. 228
  4. 152
  5. 245
  6. 980
  7. 76
  8. 2744
  9. 99
  10. 343
  11. 2450
  12. 3234
  13. 203
  14. 81
  15. 2646
  16. 2376
  17. 3626
  18. 54
  19. 76
  20. 266
  21. 36
  22. 882
  23. 539
  24. 95
  25. 441
  26. 3564
  27. 792
  28. 2871
  29. 27
  30. 228
  31. 135
  32. 228
  33. 190
  34. 54
  35. 406
  36. 152
  37. 245
  38. 1881
  39. 45
  40. 3762

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