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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 330 · 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. 1.12 × 9 =
  2. 2.5 × 19 =
  3. 3.10 × 29 =
  4. 4.15 × 99 =
  5. 5.3 × 19 =
  6. 6.3 × 19 =
  7. 7.11 × 29 =
  8. 8.38 × 99 =
  9. 9.6 × 19 =
  10. 10.6 × 9 =
  11. 11.11 × 9 =
  12. 12.6 × 49 =
  13. 13.10 × 9 =
  14. 14.5 × 99 =
  15. 15.27 × 99 =
  16. 16.15 × 9 =
  17. 17.8 × 19 =
  18. 18.14 × 9 =
  19. 19.9 × 49 =
  20. 20.6 × 19 =
  21. 21.4 × 19 =
  22. 22.27 × 98 =
  23. 23.7 × 29 =
  24. 24.7 × 29 =
  25. 25.9 × 9 =
  26. 26.5 × 29 =
  27. 27.14 × 29 =
  28. 28.6 × 29 =
  29. 29.25 × 98 =
  30. 30.7 × 9 =
  31. 31.3 × 9 =
  32. 32.3 × 29 =
  33. 33.27 × 98 =
  34. 34.22 × 98 =
  35. 35.5 × 9 =
  36. 36.4 × 19 =
  37. 37.19 × 99 =
  38. 38.13 × 49 =
  39. 39.6 × 9 =
  40. 40.10 × 9 =

Answer key

  1. 108
  2. 95
  3. 290
  4. 1485
  5. 57
  6. 57
  7. 319
  8. 3762
  9. 114
  10. 54
  11. 99
  12. 294
  13. 90
  14. 495
  15. 2673
  16. 135
  17. 152
  18. 126
  19. 441
  20. 114
  21. 76
  22. 2646
  23. 203
  24. 203
  25. 81
  26. 145
  27. 406
  28. 174
  29. 2450
  30. 63
  31. 27
  32. 87
  33. 2646
  34. 2156
  35. 45
  36. 76
  37. 1881
  38. 637
  39. 54
  40. 90

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