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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 907 · 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. 1.8 × 49 =
  2. 2.8 × 98 =
  3. 3.4 × 29 =
  4. 4.4 × 29 =
  5. 5.6 × 29 =
  6. 6.3 × 19 =
  7. 7.8 × 98 =
  8. 8.35 × 98 =
  9. 9.19 × 99 =
  10. 10.14 × 29 =
  11. 11.8 × 49 =
  12. 12.11 × 49 =
  13. 13.13 × 49 =
  14. 14.15 × 19 =
  15. 15.19 × 99 =
  16. 16.16 × 98 =
  17. 17.4 × 19 =
  18. 18.3 × 29 =
  19. 19.3 × 19 =
  20. 20.21 × 99 =
  21. 21.18 × 99 =
  22. 22.13 × 98 =
  23. 23.13 × 9 =
  24. 24.4 × 49 =
  25. 25.3 × 99 =
  26. 26.9 × 98 =
  27. 27.12 × 98 =
  28. 28.12 × 9 =
  29. 29.12 × 9 =
  30. 30.8 × 9 =
  31. 31.6 × 29 =
  32. 32.14 × 49 =
  33. 33.3 × 19 =
  34. 34.11 × 49 =
  35. 35.13 × 19 =
  36. 36.4 × 29 =
  37. 37.19 × 98 =
  38. 38.5 × 9 =
  39. 39.9 × 19 =
  40. 40.14 × 29 =

Answer key

  1. 392
  2. 784
  3. 116
  4. 116
  5. 174
  6. 57
  7. 784
  8. 3430
  9. 1881
  10. 406
  11. 392
  12. 539
  13. 637
  14. 285
  15. 1881
  16. 1568
  17. 76
  18. 87
  19. 57
  20. 2079
  21. 1782
  22. 1274
  23. 117
  24. 196
  25. 297
  26. 882
  27. 1176
  28. 108
  29. 108
  30. 72
  31. 174
  32. 686
  33. 57
  34. 539
  35. 247
  36. 116
  37. 1862
  38. 45
  39. 171
  40. 406

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