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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 485 · 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. 1.5 × 98 =
  2. 2.38 × 98 =
  3. 3.9 × 19 =
  4. 4.10 × 9 =
  5. 5.13 × 9 =
  6. 6.14 × 19 =
  7. 7.40 × 98 =
  8. 8.38 × 98 =
  9. 9.8 × 49 =
  10. 10.6 × 29 =
  11. 11.3 × 9 =
  12. 12.3 × 29 =
  13. 13.4 × 29 =
  14. 14.19 × 98 =
  15. 15.11 × 9 =
  16. 16.5 × 49 =
  17. 17.12 × 19 =
  18. 18.24 × 99 =
  19. 19.28 × 98 =
  20. 20.8 × 9 =
  21. 21.13 × 49 =
  22. 22.6 × 29 =
  23. 23.14 × 98 =
  24. 24.26 × 99 =
  25. 25.28 × 99 =
  26. 26.14 × 19 =
  27. 27.7 × 19 =
  28. 28.8 × 19 =
  29. 29.37 × 99 =
  30. 30.23 × 99 =
  31. 31.6 × 29 =
  32. 32.5 × 9 =
  33. 33.13 × 29 =
  34. 34.6 × 19 =
  35. 35.8 × 49 =
  36. 36.34 × 99 =
  37. 37.6 × 49 =
  38. 38.12 × 9 =
  39. 39.6 × 49 =
  40. 40.6 × 19 =

Answer key

  1. 490
  2. 3724
  3. 171
  4. 90
  5. 117
  6. 266
  7. 3920
  8. 3724
  9. 392
  10. 174
  11. 27
  12. 87
  13. 116
  14. 1862
  15. 99
  16. 245
  17. 228
  18. 2376
  19. 2744
  20. 72
  21. 637
  22. 174
  23. 1372
  24. 2574
  25. 2772
  26. 266
  27. 133
  28. 152
  29. 3663
  30. 2277
  31. 174
  32. 45
  33. 377
  34. 114
  35. 392
  36. 3366
  37. 294
  38. 108
  39. 294
  40. 114

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