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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 859 · 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. 2.7 × 29 =
  3. 3.4 × 99 =
  4. 4.8 × 49 =
  5. 5.3 × 9 =
  6. 6.3 × 19 =
  7. 7.10 × 9 =
  8. 8.9 × 9 =
  9. 9.13 × 19 =
  10. 10.8 × 19 =
  11. 11.10 × 99 =
  12. 12.14 × 98 =
  13. 13.13 × 9 =
  14. 14.13 × 99 =
  15. 15.8 × 19 =
  16. 16.7 × 98 =
  17. 17.9 × 49 =
  18. 18.5 × 49 =
  19. 19.5 × 29 =
  20. 20.8 × 99 =
  21. 21.40 × 99 =
  22. 22.4 × 29 =
  23. 23.5 × 9 =
  24. 24.16 × 98 =
  25. 25.14 × 29 =
  26. 26.7 × 29 =
  27. 27.21 × 98 =
  28. 28.40 × 98 =
  29. 29.9 × 98 =
  30. 30.11 × 99 =
  31. 31.8 × 98 =
  32. 32.11 × 19 =
  33. 33.13 × 98 =
  34. 34.12 × 9 =
  35. 35.4 × 29 =
  36. 36.5 × 19 =
  37. 37.7 × 49 =
  38. 38.7 × 49 =
  39. 39.35 × 99 =
  40. 40.9 × 19 =

Answer key

  1. 72
  2. 203
  3. 396
  4. 392
  5. 27
  6. 57
  7. 90
  8. 81
  9. 247
  10. 152
  11. 990
  12. 1372
  13. 117
  14. 1287
  15. 152
  16. 686
  17. 441
  18. 245
  19. 145
  20. 792
  21. 3960
  22. 116
  23. 45
  24. 1568
  25. 406
  26. 203
  27. 2058
  28. 3920
  29. 882
  30. 1089
  31. 784
  32. 209
  33. 1274
  34. 108
  35. 116
  36. 95
  37. 343
  38. 343
  39. 3465
  40. 171

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