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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 825 · 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 × 99 =
  2. 2.5 × 9 =
  3. 3.37 × 98 =
  4. 4.36 × 99 =
  5. 5.14 × 9 =
  6. 6.22 × 99 =
  7. 7.11 × 29 =
  8. 8.15 × 19 =
  9. 9.13 × 9 =
  10. 10.5 × 9 =
  11. 11.13 × 9 =
  12. 12.6 × 9 =
  13. 13.40 × 99 =
  14. 14.14 × 49 =
  15. 15.21 × 99 =
  16. 16.40 × 99 =
  17. 17.8 × 19 =
  18. 18.11 × 19 =
  19. 19.15 × 9 =
  20. 20.13 × 19 =
  21. 21.5 × 49 =
  22. 22.15 × 9 =
  23. 23.15 × 29 =
  24. 24.6 × 49 =
  25. 25.9 × 9 =
  26. 26.15 × 49 =
  27. 27.8 × 99 =
  28. 28.13 × 19 =
  29. 29.5 × 9 =
  30. 30.9 × 29 =
  31. 31.14 × 49 =
  32. 32.15 × 19 =
  33. 33.35 × 98 =
  34. 34.7 × 98 =
  35. 35.14 × 98 =
  36. 36.26 × 98 =
  37. 37.27 × 99 =
  38. 38.10 × 29 =
  39. 39.3 × 19 =
  40. 40.8 × 19 =

Answer key

  1. 297
  2. 45
  3. 3626
  4. 3564
  5. 126
  6. 2178
  7. 319
  8. 285
  9. 117
  10. 45
  11. 117
  12. 54
  13. 3960
  14. 686
  15. 2079
  16. 3960
  17. 152
  18. 209
  19. 135
  20. 247
  21. 245
  22. 135
  23. 435
  24. 294
  25. 81
  26. 735
  27. 792
  28. 247
  29. 45
  30. 261
  31. 686
  32. 285
  33. 3430
  34. 686
  35. 1372
  36. 2548
  37. 2673
  38. 290
  39. 57
  40. 152

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