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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 923 · 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. 1.6 × 19 =
  2. 2.8 × 99 =
  3. 3.13 × 49 =
  4. 4.7 × 49 =
  5. 5.4 × 9 =
  6. 6.12 × 29 =
  7. 7.9 × 19 =
  8. 8.36 × 99 =
  9. 9.5 × 19 =
  10. 10.6 × 49 =
  11. 11.32 × 98 =
  12. 12.10 × 49 =
  13. 13.34 × 98 =
  14. 14.7 × 49 =
  15. 15.8 × 49 =
  16. 16.22 × 99 =
  17. 17.12 × 19 =
  18. 18.8 × 29 =
  19. 19.8 × 29 =
  20. 20.9 × 19 =
  21. 21.12 × 9 =
  22. 22.21 × 99 =
  23. 23.7 × 99 =
  24. 24.7 × 19 =
  25. 25.14 × 49 =
  26. 26.35 × 98 =
  27. 27.13 × 29 =
  28. 28.26 × 99 =
  29. 29.19 × 99 =
  30. 30.33 × 98 =
  31. 31.3 × 9 =
  32. 32.3 × 99 =
  33. 33.30 × 99 =
  34. 34.3 × 29 =
  35. 35.5 × 98 =
  36. 36.9 × 9 =
  37. 37.4 × 29 =
  38. 38.11 × 99 =
  39. 39.4 × 29 =
  40. 40.17 × 98 =

Answer key

  1. 114
  2. 792
  3. 637
  4. 343
  5. 36
  6. 348
  7. 171
  8. 3564
  9. 95
  10. 294
  11. 3136
  12. 490
  13. 3332
  14. 343
  15. 392
  16. 2178
  17. 228
  18. 232
  19. 232
  20. 171
  21. 108
  22. 2079
  23. 693
  24. 133
  25. 686
  26. 3430
  27. 377
  28. 2574
  29. 1881
  30. 3234
  31. 27
  32. 297
  33. 2970
  34. 87
  35. 490
  36. 81
  37. 116
  38. 1089
  39. 116
  40. 1666

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