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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 681 · 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. 2.40 × 99 =
  3. 3.13 × 29 =
  4. 4.26 × 98 =
  5. 5.30 × 98 =
  6. 6.14 × 19 =
  7. 7.23 × 99 =
  8. 8.5 × 19 =
  9. 9.11 × 49 =
  10. 10.9 × 29 =
  11. 11.24 × 99 =
  12. 12.4 × 98 =
  13. 13.6 × 9 =
  14. 14.14 × 19 =
  15. 15.39 × 99 =
  16. 16.4 × 29 =
  17. 17.4 × 9 =
  18. 18.9 × 99 =
  19. 19.17 × 98 =
  20. 20.5 × 9 =
  21. 21.9 × 19 =
  22. 22.11 × 29 =
  23. 23.5 × 49 =
  24. 24.8 × 9 =
  25. 25.7 × 29 =
  26. 26.11 × 9 =
  27. 27.5 × 49 =
  28. 28.5 × 19 =
  29. 29.12 × 19 =
  30. 30.11 × 49 =
  31. 31.5 × 9 =
  32. 32.14 × 19 =
  33. 33.4 × 29 =
  34. 34.24 × 98 =
  35. 35.5 × 98 =
  36. 36.37 × 99 =
  37. 37.11 × 49 =
  38. 38.4 × 19 =
  39. 39.6 × 49 =
  40. 40.9 × 9 =

Answer key

  1. 108
  2. 3960
  3. 377
  4. 2548
  5. 2940
  6. 266
  7. 2277
  8. 95
  9. 539
  10. 261
  11. 2376
  12. 392
  13. 54
  14. 266
  15. 3861
  16. 116
  17. 36
  18. 891
  19. 1666
  20. 45
  21. 171
  22. 319
  23. 245
  24. 72
  25. 203
  26. 99
  27. 245
  28. 95
  29. 228
  30. 539
  31. 45
  32. 266
  33. 116
  34. 2352
  35. 490
  36. 3663
  37. 539
  38. 76
  39. 294
  40. 81

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