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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 606 · 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. 1.21 × 99 =
  2. 2.4 × 98 =
  3. 3.40 × 99 =
  4. 4.4 × 29 =
  5. 5.11 × 29 =
  6. 6.22 × 98 =
  7. 7.4 × 19 =
  8. 8.3 × 98 =
  9. 9.9 × 19 =
  10. 10.5 × 19 =
  11. 11.9 × 29 =
  12. 12.11 × 49 =
  13. 13.6 × 19 =
  14. 14.12 × 19 =
  15. 15.15 × 49 =
  16. 16.11 × 19 =
  17. 17.3 × 29 =
  18. 18.22 × 99 =
  19. 19.5 × 9 =
  20. 20.8 × 29 =
  21. 21.12 × 9 =
  22. 22.3 × 99 =
  23. 23.6 × 49 =
  24. 24.20 × 98 =
  25. 25.14 × 98 =
  26. 26.15 × 19 =
  27. 27.8 × 29 =
  28. 28.17 × 99 =
  29. 29.3 × 9 =
  30. 30.7 × 19 =
  31. 31.5 × 49 =
  32. 32.5 × 19 =
  33. 33.39 × 99 =
  34. 34.7 × 29 =
  35. 35.13 × 9 =
  36. 36.6 × 98 =
  37. 37.6 × 19 =
  38. 38.9 × 19 =
  39. 39.3 × 49 =
  40. 40.3 × 9 =

Answer key

  1. 2079
  2. 392
  3. 3960
  4. 116
  5. 319
  6. 2156
  7. 76
  8. 294
  9. 171
  10. 95
  11. 261
  12. 539
  13. 114
  14. 228
  15. 735
  16. 209
  17. 87
  18. 2178
  19. 45
  20. 232
  21. 108
  22. 297
  23. 294
  24. 1960
  25. 1372
  26. 285
  27. 232
  28. 1683
  29. 27
  30. 133
  31. 245
  32. 95
  33. 3861
  34. 203
  35. 117
  36. 588
  37. 114
  38. 171
  39. 147
  40. 27

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