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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 952 · 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. 1.25 × 99 =
  2. 2.4 × 9 =
  3. 3.15 × 29 =
  4. 4.13 × 49 =
  5. 5.7 × 98 =
  6. 6.14 × 99 =
  7. 7.7 × 49 =
  8. 8.12 × 49 =
  9. 9.7 × 9 =
  10. 10.9 × 49 =
  11. 11.12 × 98 =
  12. 12.7 × 9 =
  13. 13.13 × 9 =
  14. 14.34 × 99 =
  15. 15.20 × 99 =
  16. 16.40 × 98 =
  17. 17.4 × 49 =
  18. 18.30 × 99 =
  19. 19.6 × 98 =
  20. 20.5 × 19 =
  21. 21.12 × 29 =
  22. 22.8 × 49 =
  23. 23.14 × 49 =
  24. 24.4 × 98 =
  25. 25.12 × 9 =
  26. 26.3 × 98 =
  27. 27.4 × 99 =
  28. 28.6 × 19 =
  29. 29.5 × 29 =
  30. 30.8 × 49 =
  31. 31.7 × 98 =
  32. 32.3 × 49 =
  33. 33.4 × 19 =
  34. 34.14 × 19 =
  35. 35.8 × 19 =
  36. 36.10 × 29 =
  37. 37.14 × 29 =
  38. 38.6 × 9 =
  39. 39.13 × 98 =
  40. 40.9 × 9 =

Answer key

  1. 2475
  2. 36
  3. 435
  4. 637
  5. 686
  6. 1386
  7. 343
  8. 588
  9. 63
  10. 441
  11. 1176
  12. 63
  13. 117
  14. 3366
  15. 1980
  16. 3920
  17. 196
  18. 2970
  19. 588
  20. 95
  21. 348
  22. 392
  23. 686
  24. 392
  25. 108
  26. 294
  27. 396
  28. 114
  29. 145
  30. 392
  31. 686
  32. 147
  33. 76
  34. 266
  35. 152
  36. 290
  37. 406
  38. 54
  39. 1274
  40. 81

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