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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 67 · 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 × 19 =
  2. 2.4 × 29 =
  3. 3.10 × 29 =
  4. 4.3 × 9 =
  5. 5.5 × 49 =
  6. 6.10 × 9 =
  7. 7.4 × 9 =
  8. 8.9 × 9 =
  9. 9.6 × 49 =
  10. 10.15 × 9 =
  11. 11.6 × 19 =
  12. 12.12 × 9 =
  13. 13.5 × 98 =
  14. 14.35 × 99 =
  15. 15.5 × 99 =
  16. 16.7 × 98 =
  17. 17.6 × 9 =
  18. 18.18 × 98 =
  19. 19.4 × 98 =
  20. 20.4 × 9 =
  21. 21.10 × 9 =
  22. 22.3 × 49 =
  23. 23.8 × 98 =
  24. 24.6 × 9 =
  25. 25.4 × 29 =
  26. 26.4 × 9 =
  27. 27.7 × 9 =
  28. 28.8 × 29 =
  29. 29.10 × 9 =
  30. 30.6 × 19 =
  31. 31.15 × 9 =
  32. 32.11 × 98 =
  33. 33.8 × 49 =
  34. 34.3 × 29 =
  35. 35.4 × 29 =
  36. 36.7 × 9 =
  37. 37.7 × 9 =
  38. 38.9 × 49 =
  39. 39.3 × 49 =
  40. 40.18 × 98 =

Answer key

  1. 57
  2. 116
  3. 290
  4. 27
  5. 245
  6. 90
  7. 36
  8. 81
  9. 294
  10. 135
  11. 114
  12. 108
  13. 490
  14. 3465
  15. 495
  16. 686
  17. 54
  18. 1764
  19. 392
  20. 36
  21. 90
  22. 147
  23. 784
  24. 54
  25. 116
  26. 36
  27. 63
  28. 232
  29. 90
  30. 114
  31. 135
  32. 1078
  33. 392
  34. 87
  35. 116
  36. 63
  37. 63
  38. 441
  39. 147
  40. 1764

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