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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 156 · 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. 1.15 × 49 =
  2. 2.14 × 29 =
  3. 3.15 × 19 =
  4. 4.13 × 49 =
  5. 5.27 × 99 =
  6. 6.6 × 9 =
  7. 7.4 × 19 =
  8. 8.10 × 29 =
  9. 9.14 × 49 =
  10. 10.9 × 9 =
  11. 11.3 × 29 =
  12. 12.35 × 99 =
  13. 13.5 × 19 =
  14. 14.14 × 9 =
  15. 15.9 × 9 =
  16. 16.10 × 99 =
  17. 17.15 × 19 =
  18. 18.4 × 9 =
  19. 19.10 × 29 =
  20. 20.37 × 99 =
  21. 21.39 × 99 =
  22. 22.3 × 49 =
  23. 23.37 × 98 =
  24. 24.15 × 98 =
  25. 25.13 × 29 =
  26. 26.11 × 9 =
  27. 27.5 × 98 =
  28. 28.3 × 99 =
  29. 29.11 × 9 =
  30. 30.11 × 9 =
  31. 31.14 × 9 =
  32. 32.14 × 29 =
  33. 33.14 × 9 =
  34. 34.8 × 29 =
  35. 35.4 × 9 =
  36. 36.3 × 9 =
  37. 37.10 × 29 =
  38. 38.6 × 29 =
  39. 39.21 × 98 =
  40. 40.13 × 9 =

Answer key

  1. 735
  2. 406
  3. 285
  4. 637
  5. 2673
  6. 54
  7. 76
  8. 290
  9. 686
  10. 81
  11. 87
  12. 3465
  13. 95
  14. 126
  15. 81
  16. 990
  17. 285
  18. 36
  19. 290
  20. 3663
  21. 3861
  22. 147
  23. 3626
  24. 1470
  25. 377
  26. 99
  27. 490
  28. 297
  29. 99
  30. 99
  31. 126
  32. 406
  33. 126
  34. 232
  35. 36
  36. 27
  37. 290
  38. 174
  39. 2058
  40. 117

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