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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 857 · 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. 1.14 × 49 =
  2. 2.10 × 99 =
  3. 3.5 × 49 =
  4. 4.19 × 99 =
  5. 5.5 × 29 =
  6. 6.15 × 98 =
  7. 7.31 × 98 =
  8. 8.5 × 19 =
  9. 9.23 × 99 =
  10. 10.9 × 19 =
  11. 11.4 × 99 =
  12. 12.6 × 19 =
  13. 13.3 × 19 =
  14. 14.39 × 98 =
  15. 15.13 × 29 =
  16. 16.14 × 29 =
  17. 17.4 × 29 =
  18. 18.4 × 49 =
  19. 19.11 × 9 =
  20. 20.4 × 49 =
  21. 21.5 × 49 =
  22. 22.10 × 19 =
  23. 23.9 × 19 =
  24. 24.17 × 99 =
  25. 25.14 × 29 =
  26. 26.34 × 98 =
  27. 27.12 × 9 =
  28. 28.15 × 49 =
  29. 29.15 × 19 =
  30. 30.3 × 9 =
  31. 31.10 × 19 =
  32. 32.15 × 29 =
  33. 33.8 × 98 =
  34. 34.27 × 99 =
  35. 35.11 × 98 =
  36. 36.10 × 9 =
  37. 37.4 × 49 =
  38. 38.5 × 19 =
  39. 39.10 × 19 =
  40. 40.3 × 9 =

Answer key

  1. 686
  2. 990
  3. 245
  4. 1881
  5. 145
  6. 1470
  7. 3038
  8. 95
  9. 2277
  10. 171
  11. 396
  12. 114
  13. 57
  14. 3822
  15. 377
  16. 406
  17. 116
  18. 196
  19. 99
  20. 196
  21. 245
  22. 190
  23. 171
  24. 1683
  25. 406
  26. 3332
  27. 108
  28. 735
  29. 285
  30. 27
  31. 190
  32. 435
  33. 784
  34. 2673
  35. 1078
  36. 90
  37. 196
  38. 95
  39. 190
  40. 27

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