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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 55 · 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. 1.37 × 98 =
  2. 2.9 × 49 =
  3. 3.9 × 9 =
  4. 4.4 × 99 =
  5. 5.7 × 19 =
  6. 6.15 × 19 =
  7. 7.5 × 19 =
  8. 8.8 × 29 =
  9. 9.4 × 98 =
  10. 10.8 × 19 =
  11. 11.3 × 19 =
  12. 12.38 × 98 =
  13. 13.4 × 19 =
  14. 14.8 × 29 =
  15. 15.3 × 49 =
  16. 16.11 × 49 =
  17. 17.5 × 9 =
  18. 18.7 × 29 =
  19. 19.10 × 19 =
  20. 20.26 × 98 =
  21. 21.15 × 9 =
  22. 22.3 × 19 =
  23. 23.13 × 19 =
  24. 24.10 × 99 =
  25. 25.4 × 29 =
  26. 26.7 × 9 =
  27. 27.4 × 49 =
  28. 28.6 × 29 =
  29. 29.10 × 49 =
  30. 30.8 × 98 =
  31. 31.25 × 99 =
  32. 32.13 × 29 =
  33. 33.15 × 19 =
  34. 34.8 × 49 =
  35. 35.5 × 9 =
  36. 36.39 × 99 =
  37. 37.6 × 29 =
  38. 38.4 × 19 =
  39. 39.32 × 98 =
  40. 40.4 × 9 =

Answer key

  1. 3626
  2. 441
  3. 81
  4. 396
  5. 133
  6. 285
  7. 95
  8. 232
  9. 392
  10. 152
  11. 57
  12. 3724
  13. 76
  14. 232
  15. 147
  16. 539
  17. 45
  18. 203
  19. 190
  20. 2548
  21. 135
  22. 57
  23. 247
  24. 990
  25. 116
  26. 63
  27. 196
  28. 174
  29. 490
  30. 784
  31. 2475
  32. 377
  33. 285
  34. 392
  35. 45
  36. 3861
  37. 174
  38. 76
  39. 3136
  40. 36

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