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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 815 · 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. 1.13 × 9 =
  2. 2.4 × 19 =
  3. 3.4 × 19 =
  4. 4.28 × 99 =
  5. 5.10 × 9 =
  6. 6.3 × 9 =
  7. 7.6 × 29 =
  8. 8.4 × 19 =
  9. 9.15 × 29 =
  10. 10.7 × 49 =
  11. 11.6 × 49 =
  12. 12.14 × 19 =
  13. 13.8 × 49 =
  14. 14.10 × 98 =
  15. 15.4 × 9 =
  16. 16.11 × 9 =
  17. 17.20 × 99 =
  18. 18.5 × 9 =
  19. 19.13 × 49 =
  20. 20.6 × 99 =
  21. 21.6 × 9 =
  22. 22.25 × 99 =
  23. 23.31 × 98 =
  24. 24.15 × 29 =
  25. 25.4 × 99 =
  26. 26.12 × 99 =
  27. 27.9 × 29 =
  28. 28.10 × 19 =
  29. 29.4 × 29 =
  30. 30.5 × 49 =
  31. 31.9 × 19 =
  32. 32.15 × 9 =
  33. 33.13 × 49 =
  34. 34.10 × 9 =
  35. 35.8 × 9 =
  36. 36.6 × 9 =
  37. 37.4 × 9 =
  38. 38.37 × 99 =
  39. 39.15 × 19 =
  40. 40.11 × 9 =

Answer key

  1. 117
  2. 76
  3. 76
  4. 2772
  5. 90
  6. 27
  7. 174
  8. 76
  9. 435
  10. 343
  11. 294
  12. 266
  13. 392
  14. 980
  15. 36
  16. 99
  17. 1980
  18. 45
  19. 637
  20. 594
  21. 54
  22. 2475
  23. 3038
  24. 435
  25. 396
  26. 1188
  27. 261
  28. 190
  29. 116
  30. 245
  31. 171
  32. 135
  33. 637
  34. 90
  35. 72
  36. 54
  37. 36
  38. 3663
  39. 285
  40. 99

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