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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 773 · 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. 1.11 × 9 =
  2. 2.4 × 9 =
  3. 3.5 × 98 =
  4. 4.3 × 49 =
  5. 5.12 × 9 =
  6. 6.5 × 49 =
  7. 7.5 × 9 =
  8. 8.25 × 99 =
  9. 9.5 × 49 =
  10. 10.26 × 98 =
  11. 11.6 × 99 =
  12. 12.13 × 29 =
  13. 13.10 × 98 =
  14. 14.9 × 49 =
  15. 15.10 × 98 =
  16. 16.5 × 49 =
  17. 17.5 × 9 =
  18. 18.11 × 49 =
  19. 19.20 × 98 =
  20. 20.8 × 19 =
  21. 21.5 × 19 =
  22. 22.5 × 9 =
  23. 23.6 × 9 =
  24. 24.28 × 99 =
  25. 25.4 × 49 =
  26. 26.11 × 29 =
  27. 27.37 × 98 =
  28. 28.29 × 98 =
  29. 29.3 × 19 =
  30. 30.31 × 99 =
  31. 31.4 × 9 =
  32. 32.6 × 9 =
  33. 33.15 × 19 =
  34. 34.9 × 29 =
  35. 35.5 × 49 =
  36. 36.4 × 49 =
  37. 37.7 × 99 =
  38. 38.36 × 99 =
  39. 39.32 × 99 =
  40. 40.4 × 49 =

Answer key

  1. 99
  2. 36
  3. 490
  4. 147
  5. 108
  6. 245
  7. 45
  8. 2475
  9. 245
  10. 2548
  11. 594
  12. 377
  13. 980
  14. 441
  15. 980
  16. 245
  17. 45
  18. 539
  19. 1960
  20. 152
  21. 95
  22. 45
  23. 54
  24. 2772
  25. 196
  26. 319
  27. 3626
  28. 2842
  29. 57
  30. 3069
  31. 36
  32. 54
  33. 285
  34. 261
  35. 245
  36. 196
  37. 693
  38. 3564
  39. 3168
  40. 196

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