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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 855 · 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. 1.3 × 49 =
  2. 2.3 × 19 =
  3. 3.15 × 29 =
  4. 4.8 × 98 =
  5. 5.3 × 49 =
  6. 6.5 × 49 =
  7. 7.4 × 29 =
  8. 8.7 × 49 =
  9. 9.3 × 98 =
  10. 10.7 × 19 =
  11. 11.3 × 19 =
  12. 12.15 × 29 =
  13. 13.11 × 49 =
  14. 14.15 × 9 =
  15. 15.12 × 9 =
  16. 16.26 × 99 =
  17. 17.11 × 29 =
  18. 18.9 × 29 =
  19. 19.9 × 98 =
  20. 20.14 × 99 =
  21. 21.16 × 99 =
  22. 22.15 × 49 =
  23. 23.12 × 29 =
  24. 24.31 × 98 =
  25. 25.39 × 99 =
  26. 26.15 × 49 =
  27. 27.19 × 98 =
  28. 28.3 × 9 =
  29. 29.8 × 9 =
  30. 30.8 × 9 =
  31. 31.6 × 9 =
  32. 32.5 × 19 =
  33. 33.15 × 19 =
  34. 34.3 × 99 =
  35. 35.12 × 19 =
  36. 36.5 × 99 =
  37. 37.11 × 49 =
  38. 38.11 × 99 =
  39. 39.8 × 29 =
  40. 40.32 × 99 =

Answer key

  1. 147
  2. 57
  3. 435
  4. 784
  5. 147
  6. 245
  7. 116
  8. 343
  9. 294
  10. 133
  11. 57
  12. 435
  13. 539
  14. 135
  15. 108
  16. 2574
  17. 319
  18. 261
  19. 882
  20. 1386
  21. 1584
  22. 735
  23. 348
  24. 3038
  25. 3861
  26. 735
  27. 1862
  28. 27
  29. 72
  30. 72
  31. 54
  32. 95
  33. 285
  34. 297
  35. 228
  36. 495
  37. 539
  38. 1089
  39. 232
  40. 3168

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