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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 121 · 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. 1.3 × 19 =
  2. 2.5 × 19 =
  3. 3.9 × 49 =
  4. 4.40 × 98 =
  5. 5.10 × 99 =
  6. 6.5 × 29 =
  7. 7.18 × 99 =
  8. 8.3 × 9 =
  9. 9.7 × 9 =
  10. 10.9 × 9 =
  11. 11.19 × 98 =
  12. 12.10 × 9 =
  13. 13.10 × 9 =
  14. 14.32 × 99 =
  15. 15.6 × 49 =
  16. 16.9 × 19 =
  17. 17.13 × 9 =
  18. 18.34 × 99 =
  19. 19.14 × 29 =
  20. 20.5 × 19 =
  21. 21.11 × 99 =
  22. 22.5 × 9 =
  23. 23.8 × 9 =
  24. 24.25 × 98 =
  25. 25.9 × 49 =
  26. 26.5 × 98 =
  27. 27.27 × 99 =
  28. 28.14 × 49 =
  29. 29.12 × 29 =
  30. 30.6 × 99 =
  31. 31.32 × 99 =
  32. 32.3 × 9 =
  33. 33.10 × 49 =
  34. 34.11 × 19 =
  35. 35.13 × 49 =
  36. 36.12 × 9 =
  37. 37.13 × 98 =
  38. 38.9 × 9 =
  39. 39.23 × 98 =
  40. 40.13 × 29 =

Answer key

  1. 57
  2. 95
  3. 441
  4. 3920
  5. 990
  6. 145
  7. 1782
  8. 27
  9. 63
  10. 81
  11. 1862
  12. 90
  13. 90
  14. 3168
  15. 294
  16. 171
  17. 117
  18. 3366
  19. 406
  20. 95
  21. 1089
  22. 45
  23. 72
  24. 2450
  25. 441
  26. 490
  27. 2673
  28. 686
  29. 348
  30. 594
  31. 3168
  32. 27
  33. 490
  34. 209
  35. 637
  36. 108
  37. 1274
  38. 81
  39. 2254
  40. 377

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