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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 722 · 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. 1.15 × 19 =
  2. 2.6 × 98 =
  3. 3.12 × 98 =
  4. 4.13 × 98 =
  5. 5.3 × 19 =
  6. 6.9 × 29 =
  7. 7.5 × 9 =
  8. 8.3 × 99 =
  9. 9.11 × 29 =
  10. 10.4 × 19 =
  11. 11.20 × 99 =
  12. 12.4 × 49 =
  13. 13.3 × 98 =
  14. 14.3 × 19 =
  15. 15.8 × 19 =
  16. 16.8 × 49 =
  17. 17.9 × 19 =
  18. 18.35 × 98 =
  19. 19.10 × 99 =
  20. 20.11 × 9 =
  21. 21.20 × 99 =
  22. 22.13 × 98 =
  23. 23.15 × 29 =
  24. 24.3 × 19 =
  25. 25.10 × 19 =
  26. 26.5 × 29 =
  27. 27.18 × 98 =
  28. 28.14 × 29 =
  29. 29.14 × 19 =
  30. 30.5 × 29 =
  31. 31.12 × 9 =
  32. 32.8 × 49 =
  33. 33.11 × 19 =
  34. 34.8 × 29 =
  35. 35.12 × 99 =
  36. 36.20 × 98 =
  37. 37.32 × 99 =
  38. 38.6 × 29 =
  39. 39.29 × 99 =
  40. 40.9 × 9 =

Answer key

  1. 285
  2. 588
  3. 1176
  4. 1274
  5. 57
  6. 261
  7. 45
  8. 297
  9. 319
  10. 76
  11. 1980
  12. 196
  13. 294
  14. 57
  15. 152
  16. 392
  17. 171
  18. 3430
  19. 990
  20. 99
  21. 1980
  22. 1274
  23. 435
  24. 57
  25. 190
  26. 145
  27. 1764
  28. 406
  29. 266
  30. 145
  31. 108
  32. 392
  33. 209
  34. 232
  35. 1188
  36. 1960
  37. 3168
  38. 174
  39. 2871
  40. 81

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