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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 989 · 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 × 19 =
  2. 2.37 × 98 =
  3. 3.26 × 99 =
  4. 4.4 × 9 =
  5. 5.7 × 49 =
  6. 6.3 × 49 =
  7. 7.11 × 49 =
  8. 8.28 × 98 =
  9. 9.4 × 29 =
  10. 10.10 × 29 =
  11. 11.14 × 19 =
  12. 12.12 × 9 =
  13. 13.3 × 19 =
  14. 14.7 × 9 =
  15. 15.18 × 98 =
  16. 16.6 × 49 =
  17. 17.3 × 9 =
  18. 18.5 × 9 =
  19. 19.4 × 9 =
  20. 20.9 × 29 =
  21. 21.15 × 49 =
  22. 22.9 × 29 =
  23. 23.25 × 98 =
  24. 24.10 × 49 =
  25. 25.12 × 29 =
  26. 26.7 × 9 =
  27. 27.14 × 19 =
  28. 28.13 × 99 =
  29. 29.6 × 29 =
  30. 30.14 × 98 =
  31. 31.9 × 49 =
  32. 32.8 × 99 =
  33. 33.3 × 29 =
  34. 34.5 × 19 =
  35. 35.15 × 29 =
  36. 36.7 × 99 =
  37. 37.11 × 19 =
  38. 38.7 × 98 =
  39. 39.7 × 99 =
  40. 40.30 × 98 =

Answer key

  1. 152
  2. 3626
  3. 2574
  4. 36
  5. 343
  6. 147
  7. 539
  8. 2744
  9. 116
  10. 290
  11. 266
  12. 108
  13. 57
  14. 63
  15. 1764
  16. 294
  17. 27
  18. 45
  19. 36
  20. 261
  21. 735
  22. 261
  23. 2450
  24. 490
  25. 348
  26. 63
  27. 266
  28. 1287
  29. 174
  30. 1372
  31. 441
  32. 792
  33. 87
  34. 95
  35. 435
  36. 693
  37. 209
  38. 686
  39. 693
  40. 2940

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