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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 935 · 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. 2.5 × 29 =
  3. 3.16 × 98 =
  4. 4.15 × 9 =
  5. 5.35 × 99 =
  6. 6.4 × 9 =
  7. 7.11 × 9 =
  8. 8.7 × 9 =
  9. 9.14 × 98 =
  10. 10.6 × 98 =
  11. 11.9 × 19 =
  12. 12.6 × 49 =
  13. 13.12 × 49 =
  14. 14.13 × 9 =
  15. 15.29 × 98 =
  16. 16.3 × 19 =
  17. 17.11 × 29 =
  18. 18.10 × 9 =
  19. 19.12 × 9 =
  20. 20.15 × 9 =
  21. 21.7 × 29 =
  22. 22.4 × 19 =
  23. 23.7 × 9 =
  24. 24.14 × 9 =
  25. 25.21 × 98 =
  26. 26.25 × 99 =
  27. 27.27 × 98 =
  28. 28.5 × 19 =
  29. 29.8 × 9 =
  30. 30.13 × 49 =
  31. 31.30 × 99 =
  32. 32.22 × 98 =
  33. 33.31 × 99 =
  34. 34.21 × 98 =
  35. 35.7 × 9 =
  36. 36.10 × 19 =
  37. 37.13 × 98 =
  38. 38.14 × 49 =
  39. 39.13 × 29 =
  40. 40.9 × 49 =

Answer key

  1. 1980
  2. 145
  3. 1568
  4. 135
  5. 3465
  6. 36
  7. 99
  8. 63
  9. 1372
  10. 588
  11. 171
  12. 294
  13. 588
  14. 117
  15. 2842
  16. 57
  17. 319
  18. 90
  19. 108
  20. 135
  21. 203
  22. 76
  23. 63
  24. 126
  25. 2058
  26. 2475
  27. 2646
  28. 95
  29. 72
  30. 637
  31. 2970
  32. 2156
  33. 3069
  34. 2058
  35. 63
  36. 190
  37. 1274
  38. 686
  39. 377
  40. 441

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