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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 955 · 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 × 19 =
  2. 2.3 × 9 =
  3. 3.28 × 99 =
  4. 4.12 × 49 =
  5. 5.11 × 19 =
  6. 6.9 × 9 =
  7. 7.16 × 99 =
  8. 8.4 × 29 =
  9. 9.5 × 9 =
  10. 10.12 × 19 =
  11. 11.15 × 19 =
  12. 12.18 × 99 =
  13. 13.7 × 29 =
  14. 14.32 × 98 =
  15. 15.12 × 49 =
  16. 16.8 × 49 =
  17. 17.6 × 9 =
  18. 18.9 × 99 =
  19. 19.25 × 99 =
  20. 20.7 × 98 =
  21. 21.5 × 9 =
  22. 22.15 × 19 =
  23. 23.22 × 98 =
  24. 24.3 × 9 =
  25. 25.12 × 19 =
  26. 26.7 × 19 =
  27. 27.13 × 29 =
  28. 28.25 × 99 =
  29. 29.24 × 98 =
  30. 30.8 × 9 =
  31. 31.9 × 49 =
  32. 32.9 × 9 =
  33. 33.9 × 49 =
  34. 34.12 × 19 =
  35. 35.9 × 98 =
  36. 36.14 × 29 =
  37. 37.10 × 49 =
  38. 38.8 × 29 =
  39. 39.13 × 9 =
  40. 40.8 × 9 =

Answer key

  1. 190
  2. 27
  3. 2772
  4. 588
  5. 209
  6. 81
  7. 1584
  8. 116
  9. 45
  10. 228
  11. 285
  12. 1782
  13. 203
  14. 3136
  15. 588
  16. 392
  17. 54
  18. 891
  19. 2475
  20. 686
  21. 45
  22. 285
  23. 2156
  24. 27
  25. 228
  26. 133
  27. 377
  28. 2475
  29. 2352
  30. 72
  31. 441
  32. 81
  33. 441
  34. 228
  35. 882
  36. 406
  37. 490
  38. 232
  39. 117
  40. 72

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