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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 864 · 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. 1.32 × 99 =
  2. 2.4 × 29 =
  3. 3.10 × 99 =
  4. 4.10 × 49 =
  5. 5.4 × 29 =
  6. 6.27 × 99 =
  7. 7.14 × 49 =
  8. 8.27 × 98 =
  9. 9.13 × 29 =
  10. 10.35 × 98 =
  11. 11.3 × 9 =
  12. 12.5 × 49 =
  13. 13.15 × 98 =
  14. 14.9 × 99 =
  15. 15.13 × 49 =
  16. 16.3 × 49 =
  17. 17.4 × 9 =
  18. 18.4 × 19 =
  19. 19.8 × 9 =
  20. 20.3 × 9 =
  21. 21.6 × 19 =
  22. 22.3 × 98 =
  23. 23.10 × 49 =
  24. 24.9 × 9 =
  25. 25.13 × 98 =
  26. 26.8 × 49 =
  27. 27.10 × 19 =
  28. 28.4 × 9 =
  29. 29.5 × 19 =
  30. 30.3 × 9 =
  31. 31.13 × 9 =
  32. 32.7 × 19 =
  33. 33.15 × 49 =
  34. 34.3 × 98 =
  35. 35.3 × 9 =
  36. 36.15 × 98 =
  37. 37.5 × 49 =
  38. 38.13 × 19 =
  39. 39.13 × 19 =
  40. 40.10 × 49 =

Answer key

  1. 3168
  2. 116
  3. 990
  4. 490
  5. 116
  6. 2673
  7. 686
  8. 2646
  9. 377
  10. 3430
  11. 27
  12. 245
  13. 1470
  14. 891
  15. 637
  16. 147
  17. 36
  18. 76
  19. 72
  20. 27
  21. 114
  22. 294
  23. 490
  24. 81
  25. 1274
  26. 392
  27. 190
  28. 36
  29. 95
  30. 27
  31. 117
  32. 133
  33. 735
  34. 294
  35. 27
  36. 1470
  37. 245
  38. 247
  39. 247
  40. 490

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