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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 934 · 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. 1.7 × 49 =
  2. 2.22 × 98 =
  3. 3.10 × 19 =
  4. 4.35 × 99 =
  5. 5.9 × 49 =
  6. 6.9 × 29 =
  7. 7.15 × 19 =
  8. 8.7 × 49 =
  9. 9.10 × 9 =
  10. 10.5 × 19 =
  11. 11.14 × 98 =
  12. 12.11 × 49 =
  13. 13.4 × 19 =
  14. 14.34 × 98 =
  15. 15.3 × 19 =
  16. 16.26 × 98 =
  17. 17.14 × 98 =
  18. 18.22 × 99 =
  19. 19.8 × 49 =
  20. 20.14 × 9 =
  21. 21.4 × 9 =
  22. 22.5 × 49 =
  23. 23.9 × 9 =
  24. 24.3 × 49 =
  25. 25.21 × 99 =
  26. 26.12 × 49 =
  27. 27.4 × 19 =
  28. 28.6 × 29 =
  29. 29.23 × 98 =
  30. 30.8 × 29 =
  31. 31.3 × 29 =
  32. 32.21 × 98 =
  33. 33.18 × 98 =
  34. 34.9 × 98 =
  35. 35.8 × 19 =
  36. 36.38 × 98 =
  37. 37.7 × 29 =
  38. 38.14 × 9 =
  39. 39.11 × 99 =
  40. 40.3 × 9 =

Answer key

  1. 343
  2. 2156
  3. 190
  4. 3465
  5. 441
  6. 261
  7. 285
  8. 343
  9. 90
  10. 95
  11. 1372
  12. 539
  13. 76
  14. 3332
  15. 57
  16. 2548
  17. 1372
  18. 2178
  19. 392
  20. 126
  21. 36
  22. 245
  23. 81
  24. 147
  25. 2079
  26. 588
  27. 76
  28. 174
  29. 2254
  30. 232
  31. 87
  32. 2058
  33. 1764
  34. 882
  35. 152
  36. 3724
  37. 203
  38. 126
  39. 1089
  40. 27

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