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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 185 · 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. 1.3 × 9 =
  2. 2.4 × 29 =
  3. 3.12 × 19 =
  4. 4.3 × 9 =
  5. 5.3 × 49 =
  6. 6.10 × 9 =
  7. 7.10 × 19 =
  8. 8.3 × 19 =
  9. 9.8 × 19 =
  10. 10.4 × 9 =
  11. 11.6 × 9 =
  12. 12.7 × 19 =
  13. 13.15 × 19 =
  14. 14.36 × 99 =
  15. 15.32 × 98 =
  16. 16.17 × 98 =
  17. 17.14 × 29 =
  18. 18.9 × 29 =
  19. 19.12 × 9 =
  20. 20.15 × 19 =
  21. 21.8 × 29 =
  22. 22.9 × 98 =
  23. 23.9 × 98 =
  24. 24.4 × 99 =
  25. 25.15 × 49 =
  26. 26.4 × 29 =
  27. 27.14 × 29 =
  28. 28.3 × 98 =
  29. 29.15 × 9 =
  30. 30.5 × 19 =
  31. 31.7 × 19 =
  32. 32.3 × 49 =
  33. 33.4 × 9 =
  34. 34.12 × 29 =
  35. 35.3 × 98 =
  36. 36.3 × 29 =
  37. 37.3 × 19 =
  38. 38.15 × 19 =
  39. 39.16 × 98 =
  40. 40.28 × 98 =

Answer key

  1. 27
  2. 116
  3. 228
  4. 27
  5. 147
  6. 90
  7. 190
  8. 57
  9. 152
  10. 36
  11. 54
  12. 133
  13. 285
  14. 3564
  15. 3136
  16. 1666
  17. 406
  18. 261
  19. 108
  20. 285
  21. 232
  22. 882
  23. 882
  24. 396
  25. 735
  26. 116
  27. 406
  28. 294
  29. 135
  30. 95
  31. 133
  32. 147
  33. 36
  34. 348
  35. 294
  36. 87
  37. 57
  38. 285
  39. 1568
  40. 2744

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