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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 908 · 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. 1.14 × 19 =
  2. 2.14 × 9 =
  3. 3.7 × 9 =
  4. 4.12 × 29 =
  5. 5.7 × 9 =
  6. 6.6 × 98 =
  7. 7.36 × 99 =
  8. 8.9 × 29 =
  9. 9.13 × 99 =
  10. 10.10 × 19 =
  11. 11.13 × 19 =
  12. 12.10 × 99 =
  13. 13.3 × 9 =
  14. 14.7 × 29 =
  15. 15.5 × 49 =
  16. 16.28 × 99 =
  17. 17.12 × 9 =
  18. 18.10 × 9 =
  19. 19.5 × 29 =
  20. 20.8 × 98 =
  21. 21.11 × 99 =
  22. 22.3 × 49 =
  23. 23.8 × 98 =
  24. 24.8 × 9 =
  25. 25.21 × 99 =
  26. 26.4 × 19 =
  27. 27.13 × 9 =
  28. 28.22 × 98 =
  29. 29.13 × 19 =
  30. 30.14 × 49 =
  31. 31.15 × 9 =
  32. 32.3 × 9 =
  33. 33.3 × 49 =
  34. 34.15 × 49 =
  35. 35.6 × 29 =
  36. 36.9 × 99 =
  37. 37.7 × 9 =
  38. 38.6 × 49 =
  39. 39.14 × 49 =
  40. 40.15 × 49 =

Answer key

  1. 266
  2. 126
  3. 63
  4. 348
  5. 63
  6. 588
  7. 3564
  8. 261
  9. 1287
  10. 190
  11. 247
  12. 990
  13. 27
  14. 203
  15. 245
  16. 2772
  17. 108
  18. 90
  19. 145
  20. 784
  21. 1089
  22. 147
  23. 784
  24. 72
  25. 2079
  26. 76
  27. 117
  28. 2156
  29. 247
  30. 686
  31. 135
  32. 27
  33. 147
  34. 735
  35. 174
  36. 891
  37. 63
  38. 294
  39. 686
  40. 735

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