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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 114 · 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. 1.5 × 49 =
  2. 2.4 × 19 =
  3. 3.3 × 29 =
  4. 4.5 × 98 =
  5. 5.12 × 49 =
  6. 6.3 × 29 =
  7. 7.13 × 19 =
  8. 8.10 × 98 =
  9. 9.33 × 99 =
  10. 10.7 × 49 =
  11. 11.40 × 98 =
  12. 12.13 × 98 =
  13. 13.3 × 98 =
  14. 14.10 × 9 =
  15. 15.14 × 19 =
  16. 16.5 × 49 =
  17. 17.8 × 19 =
  18. 18.12 × 9 =
  19. 19.15 × 9 =
  20. 20.14 × 19 =
  21. 21.6 × 9 =
  22. 22.4 × 9 =
  23. 23.12 × 49 =
  24. 24.14 × 19 =
  25. 25.8 × 19 =
  26. 26.10 × 49 =
  27. 27.3 × 19 =
  28. 28.11 × 19 =
  29. 29.34 × 99 =
  30. 30.6 × 99 =
  31. 31.9 × 29 =
  32. 32.6 × 99 =
  33. 33.31 × 98 =
  34. 34.9 × 9 =
  35. 35.6 × 49 =
  36. 36.6 × 29 =
  37. 37.6 × 9 =
  38. 38.5 × 49 =
  39. 39.6 × 29 =
  40. 40.32 × 99 =

Answer key

  1. 245
  2. 76
  3. 87
  4. 490
  5. 588
  6. 87
  7. 247
  8. 980
  9. 3267
  10. 343
  11. 3920
  12. 1274
  13. 294
  14. 90
  15. 266
  16. 245
  17. 152
  18. 108
  19. 135
  20. 266
  21. 54
  22. 36
  23. 588
  24. 266
  25. 152
  26. 490
  27. 57
  28. 209
  29. 3366
  30. 594
  31. 261
  32. 594
  33. 3038
  34. 81
  35. 294
  36. 174
  37. 54
  38. 245
  39. 174
  40. 3168

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