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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 979 · 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. 1.3 × 9 =
  2. 2.25 × 99 =
  3. 3.12 × 9 =
  4. 4.12 × 29 =
  5. 5.15 × 29 =
  6. 6.12 × 9 =
  7. 7.4 × 49 =
  8. 8.9 × 29 =
  9. 9.5 × 98 =
  10. 10.11 × 29 =
  11. 11.8 × 98 =
  12. 12.11 × 29 =
  13. 13.4 × 29 =
  14. 14.14 × 19 =
  15. 15.12 × 99 =
  16. 16.33 × 98 =
  17. 17.14 × 9 =
  18. 18.12 × 9 =
  19. 19.11 × 9 =
  20. 20.13 × 19 =
  21. 21.3 × 98 =
  22. 22.6 × 29 =
  23. 23.8 × 19 =
  24. 24.5 × 19 =
  25. 25.6 × 49 =
  26. 26.14 × 19 =
  27. 27.11 × 98 =
  28. 28.9 × 19 =
  29. 29.37 × 98 =
  30. 30.10 × 98 =
  31. 31.5 × 9 =
  32. 32.9 × 99 =
  33. 33.15 × 29 =
  34. 34.9 × 49 =
  35. 35.8 × 9 =
  36. 36.13 × 99 =
  37. 37.35 × 99 =
  38. 38.15 × 49 =
  39. 39.12 × 9 =
  40. 40.38 × 98 =

Answer key

  1. 27
  2. 2475
  3. 108
  4. 348
  5. 435
  6. 108
  7. 196
  8. 261
  9. 490
  10. 319
  11. 784
  12. 319
  13. 116
  14. 266
  15. 1188
  16. 3234
  17. 126
  18. 108
  19. 99
  20. 247
  21. 294
  22. 174
  23. 152
  24. 95
  25. 294
  26. 266
  27. 1078
  28. 171
  29. 3626
  30. 980
  31. 45
  32. 891
  33. 435
  34. 441
  35. 72
  36. 1287
  37. 3465
  38. 735
  39. 108
  40. 3724

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