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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 860 · 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 × 9 =
  2. 2.3 × 29 =
  3. 3.12 × 29 =
  4. 4.6 × 98 =
  5. 5.8 × 19 =
  6. 6.12 × 19 =
  7. 7.7 × 49 =
  8. 8.4 × 49 =
  9. 9.14 × 29 =
  10. 10.21 × 99 =
  11. 11.7 × 49 =
  12. 12.4 × 29 =
  13. 13.18 × 98 =
  14. 14.5 × 9 =
  15. 15.12 × 9 =
  16. 16.3 × 9 =
  17. 17.8 × 99 =
  18. 18.31 × 99 =
  19. 19.13 × 49 =
  20. 20.5 × 99 =
  21. 21.35 × 98 =
  22. 22.15 × 99 =
  23. 23.9 × 29 =
  24. 24.14 × 9 =
  25. 25.4 × 19 =
  26. 26.8 × 29 =
  27. 27.15 × 49 =
  28. 28.8 × 29 =
  29. 29.18 × 99 =
  30. 30.7 × 9 =
  31. 31.13 × 9 =
  32. 32.3 × 9 =
  33. 33.4 × 98 =
  34. 34.11 × 19 =
  35. 35.13 × 29 =
  36. 36.10 × 49 =
  37. 37.10 × 49 =
  38. 38.8 × 29 =
  39. 39.13 × 19 =
  40. 40.14 × 49 =

Answer key

  1. 72
  2. 87
  3. 348
  4. 588
  5. 152
  6. 228
  7. 343
  8. 196
  9. 406
  10. 2079
  11. 343
  12. 116
  13. 1764
  14. 45
  15. 108
  16. 27
  17. 792
  18. 3069
  19. 637
  20. 495
  21. 3430
  22. 1485
  23. 261
  24. 126
  25. 76
  26. 232
  27. 735
  28. 232
  29. 1782
  30. 63
  31. 117
  32. 27
  33. 392
  34. 209
  35. 377
  36. 490
  37. 490
  38. 232
  39. 247
  40. 686

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