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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 311 · 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. 1.6 × 9 =
  2. 2.7 × 98 =
  3. 3.12 × 29 =
  4. 4.10 × 99 =
  5. 5.3 × 49 =
  6. 6.5 × 9 =
  7. 7.6 × 9 =
  8. 8.11 × 9 =
  9. 9.3 × 19 =
  10. 10.9 × 9 =
  11. 11.8 × 98 =
  12. 12.13 × 29 =
  13. 13.11 × 29 =
  14. 14.9 × 29 =
  15. 15.14 × 49 =
  16. 16.12 × 49 =
  17. 17.7 × 19 =
  18. 18.14 × 9 =
  19. 19.13 × 29 =
  20. 20.15 × 49 =
  21. 21.8 × 98 =
  22. 22.3 × 49 =
  23. 23.4 × 19 =
  24. 24.3 × 19 =
  25. 25.15 × 29 =
  26. 26.12 × 29 =
  27. 27.11 × 98 =
  28. 28.7 × 19 =
  29. 29.5 × 29 =
  30. 30.40 × 99 =
  31. 31.39 × 98 =
  32. 32.5 × 29 =
  33. 33.12 × 9 =
  34. 34.6 × 19 =
  35. 35.5 × 98 =
  36. 36.13 × 99 =
  37. 37.30 × 98 =
  38. 38.13 × 9 =
  39. 39.9 × 9 =
  40. 40.9 × 19 =

Answer key

  1. 54
  2. 686
  3. 348
  4. 990
  5. 147
  6. 45
  7. 54
  8. 99
  9. 57
  10. 81
  11. 784
  12. 377
  13. 319
  14. 261
  15. 686
  16. 588
  17. 133
  18. 126
  19. 377
  20. 735
  21. 784
  22. 147
  23. 76
  24. 57
  25. 435
  26. 348
  27. 1078
  28. 133
  29. 145
  30. 3960
  31. 3822
  32. 145
  33. 108
  34. 114
  35. 490
  36. 1287
  37. 2940
  38. 117
  39. 81
  40. 171

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