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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 791 · 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. 1.4 × 98 =
  2. 2.8 × 99 =
  3. 3.33 × 99 =
  4. 4.9 × 98 =
  5. 5.6 × 49 =
  6. 6.8 × 19 =
  7. 7.4 × 29 =
  8. 8.31 × 99 =
  9. 9.11 × 9 =
  10. 10.11 × 19 =
  11. 11.3 × 98 =
  12. 12.9 × 19 =
  13. 13.38 × 99 =
  14. 14.33 × 98 =
  15. 15.6 × 9 =
  16. 16.6 × 19 =
  17. 17.7 × 19 =
  18. 18.12 × 49 =
  19. 19.3 × 9 =
  20. 20.5 × 9 =
  21. 21.11 × 98 =
  22. 22.12 × 19 =
  23. 23.30 × 98 =
  24. 24.32 × 99 =
  25. 25.29 × 99 =
  26. 26.11 × 9 =
  27. 27.18 × 99 =
  28. 28.28 × 98 =
  29. 29.12 × 19 =
  30. 30.15 × 49 =
  31. 31.14 × 19 =
  32. 32.38 × 99 =
  33. 33.9 × 9 =
  34. 34.5 × 9 =
  35. 35.5 × 19 =
  36. 36.3 × 9 =
  37. 37.15 × 49 =
  38. 38.11 × 49 =
  39. 39.7 × 29 =
  40. 40.14 × 29 =

Answer key

  1. 392
  2. 792
  3. 3267
  4. 882
  5. 294
  6. 152
  7. 116
  8. 3069
  9. 99
  10. 209
  11. 294
  12. 171
  13. 3762
  14. 3234
  15. 54
  16. 114
  17. 133
  18. 588
  19. 27
  20. 45
  21. 1078
  22. 228
  23. 2940
  24. 3168
  25. 2871
  26. 99
  27. 1782
  28. 2744
  29. 228
  30. 735
  31. 266
  32. 3762
  33. 81
  34. 45
  35. 95
  36. 27
  37. 735
  38. 539
  39. 203
  40. 406

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