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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 998 · 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. 1.13 × 99 =
  2. 2.5 × 9 =
  3. 3.11 × 98 =
  4. 4.19 × 98 =
  5. 5.8 × 19 =
  6. 6.23 × 99 =
  7. 7.11 × 29 =
  8. 8.13 × 19 =
  9. 9.5 × 19 =
  10. 10.10 × 49 =
  11. 11.4 × 98 =
  12. 12.15 × 99 =
  13. 13.12 × 29 =
  14. 14.7 × 19 =
  15. 15.4 × 9 =
  16. 16.12 × 9 =
  17. 17.3 × 9 =
  18. 18.14 × 9 =
  19. 19.12 × 9 =
  20. 20.37 × 99 =
  21. 21.9 × 19 =
  22. 22.30 × 99 =
  23. 23.7 × 29 =
  24. 24.20 × 98 =
  25. 25.38 × 98 =
  26. 26.36 × 99 =
  27. 27.10 × 9 =
  28. 28.15 × 29 =
  29. 29.13 × 19 =
  30. 30.20 × 99 =
  31. 31.10 × 49 =
  32. 32.8 × 9 =
  33. 33.9 × 19 =
  34. 34.13 × 98 =
  35. 35.4 × 49 =
  36. 36.3 × 9 =
  37. 37.15 × 9 =
  38. 38.3 × 99 =
  39. 39.28 × 98 =
  40. 40.4 × 9 =

Answer key

  1. 1287
  2. 45
  3. 1078
  4. 1862
  5. 152
  6. 2277
  7. 319
  8. 247
  9. 95
  10. 490
  11. 392
  12. 1485
  13. 348
  14. 133
  15. 36
  16. 108
  17. 27
  18. 126
  19. 108
  20. 3663
  21. 171
  22. 2970
  23. 203
  24. 1960
  25. 3724
  26. 3564
  27. 90
  28. 435
  29. 247
  30. 1980
  31. 490
  32. 72
  33. 171
  34. 1274
  35. 196
  36. 27
  37. 135
  38. 297
  39. 2744
  40. 36

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