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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 80 · 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 × 49 =
  2. 2.10 × 49 =
  3. 3.13 × 19 =
  4. 4.19 × 99 =
  5. 5.14 × 19 =
  6. 6.20 × 98 =
  7. 7.5 × 9 =
  8. 8.21 × 98 =
  9. 9.4 × 29 =
  10. 10.15 × 29 =
  11. 11.15 × 29 =
  12. 12.30 × 99 =
  13. 13.15 × 49 =
  14. 14.4 × 9 =
  15. 15.14 × 49 =
  16. 16.5 × 29 =
  17. 17.11 × 29 =
  18. 18.7 × 29 =
  19. 19.15 × 49 =
  20. 20.3 × 9 =
  21. 21.5 × 29 =
  22. 22.7 × 19 =
  23. 23.12 × 49 =
  24. 24.9 × 49 =
  25. 25.10 × 49 =
  26. 26.10 × 9 =
  27. 27.15 × 19 =
  28. 28.7 × 29 =
  29. 29.4 × 19 =
  30. 30.15 × 19 =
  31. 31.7 × 19 =
  32. 32.6 × 19 =
  33. 33.19 × 99 =
  34. 34.14 × 19 =
  35. 35.35 × 99 =
  36. 36.10 × 49 =
  37. 37.3 × 9 =
  38. 38.13 × 49 =
  39. 39.3 × 29 =
  40. 40.6 × 49 =

Answer key

  1. 588
  2. 490
  3. 247
  4. 1881
  5. 266
  6. 1960
  7. 45
  8. 2058
  9. 116
  10. 435
  11. 435
  12. 2970
  13. 735
  14. 36
  15. 686
  16. 145
  17. 319
  18. 203
  19. 735
  20. 27
  21. 145
  22. 133
  23. 588
  24. 441
  25. 490
  26. 90
  27. 285
  28. 203
  29. 76
  30. 285
  31. 133
  32. 114
  33. 1881
  34. 266
  35. 3465
  36. 490
  37. 27
  38. 637
  39. 87
  40. 294

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