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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 823 · 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. 1.7 × 9 =
  2. 2.14 × 9 =
  3. 3.15 × 29 =
  4. 4.7 × 19 =
  5. 5.12 × 49 =
  6. 6.29 × 99 =
  7. 7.22 × 98 =
  8. 8.8 × 19 =
  9. 9.10 × 19 =
  10. 10.5 × 49 =
  11. 11.6 × 9 =
  12. 12.39 × 98 =
  13. 13.6 × 19 =
  14. 14.8 × 49 =
  15. 15.8 × 99 =
  16. 16.5 × 98 =
  17. 17.13 × 49 =
  18. 18.5 × 9 =
  19. 19.14 × 29 =
  20. 20.8 × 29 =
  21. 21.14 × 49 =
  22. 22.10 × 99 =
  23. 23.8 × 19 =
  24. 24.8 × 49 =
  25. 25.6 × 9 =
  26. 26.14 × 9 =
  27. 27.5 × 19 =
  28. 28.40 × 99 =
  29. 29.10 × 9 =
  30. 30.6 × 29 =
  31. 31.11 × 49 =
  32. 32.19 × 98 =
  33. 33.13 × 19 =
  34. 34.24 × 99 =
  35. 35.3 × 29 =
  36. 36.13 × 49 =
  37. 37.13 × 29 =
  38. 38.15 × 19 =
  39. 39.23 × 98 =
  40. 40.14 × 49 =

Answer key

  1. 63
  2. 126
  3. 435
  4. 133
  5. 588
  6. 2871
  7. 2156
  8. 152
  9. 190
  10. 245
  11. 54
  12. 3822
  13. 114
  14. 392
  15. 792
  16. 490
  17. 637
  18. 45
  19. 406
  20. 232
  21. 686
  22. 990
  23. 152
  24. 392
  25. 54
  26. 126
  27. 95
  28. 3960
  29. 90
  30. 174
  31. 539
  32. 1862
  33. 247
  34. 2376
  35. 87
  36. 637
  37. 377
  38. 285
  39. 2254
  40. 686

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