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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 874 · 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. 1.10 × 29 =
  2. 2.39 × 99 =
  3. 3.11 × 19 =
  4. 4.30 × 98 =
  5. 5.5 × 19 =
  6. 6.8 × 9 =
  7. 7.13 × 99 =
  8. 8.3 × 19 =
  9. 9.8 × 29 =
  10. 10.3 × 9 =
  11. 11.8 × 9 =
  12. 12.25 × 99 =
  13. 13.11 × 9 =
  14. 14.4 × 29 =
  15. 15.9 × 19 =
  16. 16.15 × 99 =
  17. 17.7 × 9 =
  18. 18.14 × 29 =
  19. 19.13 × 98 =
  20. 20.8 × 49 =
  21. 21.6 × 98 =
  22. 22.9 × 98 =
  23. 23.14 × 29 =
  24. 24.3 × 49 =
  25. 25.14 × 29 =
  26. 26.4 × 99 =
  27. 27.14 × 9 =
  28. 28.9 × 49 =
  29. 29.29 × 99 =
  30. 30.15 × 99 =
  31. 31.14 × 9 =
  32. 32.11 × 49 =
  33. 33.10 × 19 =
  34. 34.38 × 99 =
  35. 35.4 × 29 =
  36. 36.3 × 49 =
  37. 37.7 × 19 =
  38. 38.5 × 19 =
  39. 39.9 × 9 =
  40. 40.5 × 29 =

Answer key

  1. 290
  2. 3861
  3. 209
  4. 2940
  5. 95
  6. 72
  7. 1287
  8. 57
  9. 232
  10. 27
  11. 72
  12. 2475
  13. 99
  14. 116
  15. 171
  16. 1485
  17. 63
  18. 406
  19. 1274
  20. 392
  21. 588
  22. 882
  23. 406
  24. 147
  25. 406
  26. 396
  27. 126
  28. 441
  29. 2871
  30. 1485
  31. 126
  32. 539
  33. 190
  34. 3762
  35. 116
  36. 147
  37. 133
  38. 95
  39. 81
  40. 145

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