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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 281 · 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. 1.13 × 9 =
  2. 2.13 × 98 =
  3. 3.11 × 19 =
  4. 4.4 × 19 =
  5. 5.5 × 49 =
  6. 6.8 × 29 =
  7. 7.6 × 19 =
  8. 8.9 × 99 =
  9. 9.5 × 29 =
  10. 10.36 × 99 =
  11. 11.33 × 98 =
  12. 12.12 × 29 =
  13. 13.11 × 29 =
  14. 14.5 × 98 =
  15. 15.29 × 98 =
  16. 16.13 × 9 =
  17. 17.7 × 49 =
  18. 18.28 × 98 =
  19. 19.8 × 29 =
  20. 20.14 × 99 =
  21. 21.6 × 19 =
  22. 22.6 × 29 =
  23. 23.6 × 29 =
  24. 24.6 × 9 =
  25. 25.9 × 49 =
  26. 26.9 × 29 =
  27. 27.3 × 99 =
  28. 28.26 × 98 =
  29. 29.10 × 98 =
  30. 30.6 × 49 =
  31. 31.4 × 99 =
  32. 32.3 × 9 =
  33. 33.10 × 19 =
  34. 34.4 × 99 =
  35. 35.14 × 49 =
  36. 36.15 × 98 =
  37. 37.9 × 19 =
  38. 38.5 × 49 =
  39. 39.40 × 99 =
  40. 40.30 × 98 =

Answer key

  1. 117
  2. 1274
  3. 209
  4. 76
  5. 245
  6. 232
  7. 114
  8. 891
  9. 145
  10. 3564
  11. 3234
  12. 348
  13. 319
  14. 490
  15. 2842
  16. 117
  17. 343
  18. 2744
  19. 232
  20. 1386
  21. 114
  22. 174
  23. 174
  24. 54
  25. 441
  26. 261
  27. 297
  28. 2548
  29. 980
  30. 294
  31. 396
  32. 27
  33. 190
  34. 396
  35. 686
  36. 1470
  37. 171
  38. 245
  39. 3960
  40. 2940

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