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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 865 · 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. 1.7 × 49 =
  2. 2.17 × 98 =
  3. 3.6 × 98 =
  4. 4.7 × 9 =
  5. 5.10 × 9 =
  6. 6.6 × 49 =
  7. 7.5 × 19 =
  8. 8.11 × 19 =
  9. 9.11 × 29 =
  10. 10.8 × 9 =
  11. 11.9 × 19 =
  12. 12.13 × 99 =
  13. 13.15 × 29 =
  14. 14.12 × 19 =
  15. 15.18 × 98 =
  16. 16.10 × 19 =
  17. 17.15 × 29 =
  18. 18.6 × 29 =
  19. 19.35 × 99 =
  20. 20.11 × 9 =
  21. 21.9 × 19 =
  22. 22.21 × 99 =
  23. 23.6 × 99 =
  24. 24.10 × 19 =
  25. 25.15 × 29 =
  26. 26.39 × 98 =
  27. 27.5 × 9 =
  28. 28.18 × 98 =
  29. 29.3 × 49 =
  30. 30.4 × 29 =
  31. 31.20 × 99 =
  32. 32.7 × 99 =
  33. 33.7 × 49 =
  34. 34.8 × 99 =
  35. 35.13 × 19 =
  36. 36.7 × 19 =
  37. 37.12 × 9 =
  38. 38.4 × 9 =
  39. 39.10 × 19 =
  40. 40.3 × 9 =

Answer key

  1. 343
  2. 1666
  3. 588
  4. 63
  5. 90
  6. 294
  7. 95
  8. 209
  9. 319
  10. 72
  11. 171
  12. 1287
  13. 435
  14. 228
  15. 1764
  16. 190
  17. 435
  18. 174
  19. 3465
  20. 99
  21. 171
  22. 2079
  23. 594
  24. 190
  25. 435
  26. 3822
  27. 45
  28. 1764
  29. 147
  30. 116
  31. 1980
  32. 693
  33. 343
  34. 792
  35. 247
  36. 133
  37. 108
  38. 36
  39. 190
  40. 27

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