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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 306 · 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. 1.11 × 99 =
  2. 2.14 × 9 =
  3. 3.13 × 99 =
  4. 4.11 × 29 =
  5. 5.12 × 19 =
  6. 6.20 × 99 =
  7. 7.3 × 9 =
  8. 8.36 × 98 =
  9. 9.10 × 9 =
  10. 10.5 × 49 =
  11. 11.14 × 9 =
  12. 12.7 × 49 =
  13. 13.8 × 9 =
  14. 14.15 × 29 =
  15. 15.11 × 9 =
  16. 16.7 × 19 =
  17. 17.6 × 9 =
  18. 18.12 × 19 =
  19. 19.4 × 29 =
  20. 20.12 × 9 =
  21. 21.8 × 19 =
  22. 22.12 × 99 =
  23. 23.22 × 98 =
  24. 24.25 × 99 =
  25. 25.12 × 29 =
  26. 26.15 × 9 =
  27. 27.7 × 19 =
  28. 28.39 × 99 =
  29. 29.12 × 9 =
  30. 30.15 × 49 =
  31. 31.8 × 49 =
  32. 32.3 × 9 =
  33. 33.8 × 19 =
  34. 34.3 × 49 =
  35. 35.4 × 19 =
  36. 36.12 × 49 =
  37. 37.7 × 98 =
  38. 38.6 × 29 =
  39. 39.15 × 29 =
  40. 40.39 × 99 =

Answer key

  1. 1089
  2. 126
  3. 1287
  4. 319
  5. 228
  6. 1980
  7. 27
  8. 3528
  9. 90
  10. 245
  11. 126
  12. 343
  13. 72
  14. 435
  15. 99
  16. 133
  17. 54
  18. 228
  19. 116
  20. 108
  21. 152
  22. 1188
  23. 2156
  24. 2475
  25. 348
  26. 135
  27. 133
  28. 3861
  29. 108
  30. 735
  31. 392
  32. 27
  33. 152
  34. 147
  35. 76
  36. 588
  37. 686
  38. 174
  39. 435
  40. 3861

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