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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 280 · 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 × 29 =
  2. 2.5 × 49 =
  3. 3.4 × 29 =
  4. 4.12 × 99 =
  5. 5.3 × 9 =
  6. 6.15 × 29 =
  7. 7.8 × 9 =
  8. 8.5 × 9 =
  9. 9.5 × 19 =
  10. 10.3 × 9 =
  11. 11.9 × 19 =
  12. 12.14 × 49 =
  13. 13.3 × 19 =
  14. 14.11 × 29 =
  15. 15.14 × 19 =
  16. 16.7 × 9 =
  17. 17.29 × 99 =
  18. 18.15 × 19 =
  19. 19.15 × 49 =
  20. 20.8 × 9 =
  21. 21.13 × 99 =
  22. 22.12 × 29 =
  23. 23.6 × 29 =
  24. 24.13 × 98 =
  25. 25.15 × 9 =
  26. 26.10 × 98 =
  27. 27.38 × 98 =
  28. 28.13 × 9 =
  29. 29.4 × 9 =
  30. 30.40 × 98 =
  31. 31.12 × 9 =
  32. 32.39 × 99 =
  33. 33.12 × 9 =
  34. 34.4 × 19 =
  35. 35.3 × 9 =
  36. 36.4 × 9 =
  37. 37.7 × 99 =
  38. 38.3 × 99 =
  39. 39.4 × 19 =
  40. 40.8 × 9 =

Answer key

  1. 319
  2. 245
  3. 116
  4. 1188
  5. 27
  6. 435
  7. 72
  8. 45
  9. 95
  10. 27
  11. 171
  12. 686
  13. 57
  14. 319
  15. 266
  16. 63
  17. 2871
  18. 285
  19. 735
  20. 72
  21. 1287
  22. 348
  23. 174
  24. 1274
  25. 135
  26. 980
  27. 3724
  28. 117
  29. 36
  30. 3920
  31. 108
  32. 3861
  33. 108
  34. 76
  35. 27
  36. 36
  37. 693
  38. 297
  39. 76
  40. 72

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