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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 447 · 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. 1.32 × 99 =
  2. 2.25 × 98 =
  3. 3.3 × 9 =
  4. 4.6 × 99 =
  5. 5.13 × 9 =
  6. 6.3 × 49 =
  7. 7.15 × 19 =
  8. 8.8 × 49 =
  9. 9.5 × 99 =
  10. 10.10 × 98 =
  11. 11.12 × 99 =
  12. 12.14 × 99 =
  13. 13.9 × 99 =
  14. 14.4 × 49 =
  15. 15.10 × 99 =
  16. 16.7 × 9 =
  17. 17.5 × 29 =
  18. 18.8 × 19 =
  19. 19.4 × 29 =
  20. 20.4 × 29 =
  21. 21.13 × 99 =
  22. 22.13 × 19 =
  23. 23.14 × 9 =
  24. 24.3 × 9 =
  25. 25.6 × 19 =
  26. 26.4 × 49 =
  27. 27.14 × 9 =
  28. 28.8 × 19 =
  29. 29.9 × 9 =
  30. 30.8 × 9 =
  31. 31.10 × 9 =
  32. 32.10 × 49 =
  33. 33.36 × 99 =
  34. 34.6 × 19 =
  35. 35.13 × 19 =
  36. 36.23 × 99 =
  37. 37.8 × 19 =
  38. 38.10 × 98 =
  39. 39.33 × 98 =
  40. 40.14 × 19 =

Answer key

  1. 3168
  2. 2450
  3. 27
  4. 594
  5. 117
  6. 147
  7. 285
  8. 392
  9. 495
  10. 980
  11. 1188
  12. 1386
  13. 891
  14. 196
  15. 990
  16. 63
  17. 145
  18. 152
  19. 116
  20. 116
  21. 1287
  22. 247
  23. 126
  24. 27
  25. 114
  26. 196
  27. 126
  28. 152
  29. 81
  30. 72
  31. 90
  32. 490
  33. 3564
  34. 114
  35. 247
  36. 2277
  37. 152
  38. 980
  39. 3234
  40. 266

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