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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 912 · 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. 1.20 × 99 =
  2. 2.6 × 29 =
  3. 3.15 × 49 =
  4. 4.38 × 98 =
  5. 5.12 × 98 =
  6. 6.23 × 99 =
  7. 7.9 × 98 =
  8. 8.12 × 99 =
  9. 9.12 × 49 =
  10. 10.6 × 49 =
  11. 11.14 × 49 =
  12. 12.14 × 19 =
  13. 13.17 × 98 =
  14. 14.22 × 98 =
  15. 15.4 × 29 =
  16. 16.15 × 9 =
  17. 17.14 × 9 =
  18. 18.4 × 49 =
  19. 19.28 × 99 =
  20. 20.5 × 19 =
  21. 21.33 × 98 =
  22. 22.3 × 9 =
  23. 23.8 × 98 =
  24. 24.4 × 19 =
  25. 25.39 × 99 =
  26. 26.6 × 49 =
  27. 27.10 × 29 =
  28. 28.38 × 98 =
  29. 29.14 × 49 =
  30. 30.11 × 19 =
  31. 31.29 × 99 =
  32. 32.4 × 49 =
  33. 33.3 × 49 =
  34. 34.10 × 19 =
  35. 35.9 × 9 =
  36. 36.13 × 9 =
  37. 37.15 × 19 =
  38. 38.9 × 98 =
  39. 39.3 × 9 =
  40. 40.10 × 98 =

Answer key

  1. 1980
  2. 174
  3. 735
  4. 3724
  5. 1176
  6. 2277
  7. 882
  8. 1188
  9. 588
  10. 294
  11. 686
  12. 266
  13. 1666
  14. 2156
  15. 116
  16. 135
  17. 126
  18. 196
  19. 2772
  20. 95
  21. 3234
  22. 27
  23. 784
  24. 76
  25. 3861
  26. 294
  27. 290
  28. 3724
  29. 686
  30. 209
  31. 2871
  32. 196
  33. 147
  34. 190
  35. 81
  36. 117
  37. 285
  38. 882
  39. 27
  40. 980

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