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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 271 · 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. 1.10 × 19 =
  2. 2.8 × 29 =
  3. 3.4 × 98 =
  4. 4.24 × 99 =
  5. 5.8 × 49 =
  6. 6.7 × 19 =
  7. 7.36 × 99 =
  8. 8.8 × 29 =
  9. 9.13 × 99 =
  10. 10.8 × 19 =
  11. 11.14 × 9 =
  12. 12.6 × 9 =
  13. 13.37 × 98 =
  14. 14.19 × 98 =
  15. 15.12 × 19 =
  16. 16.11 × 29 =
  17. 17.20 × 98 =
  18. 18.5 × 9 =
  19. 19.9 × 9 =
  20. 20.13 × 19 =
  21. 21.5 × 19 =
  22. 22.9 × 99 =
  23. 23.28 × 98 =
  24. 24.10 × 98 =
  25. 25.13 × 29 =
  26. 26.12 × 9 =
  27. 27.8 × 29 =
  28. 28.8 × 98 =
  29. 29.3 × 9 =
  30. 30.23 × 99 =
  31. 31.8 × 19 =
  32. 32.4 × 49 =
  33. 33.26 × 99 =
  34. 34.11 × 49 =
  35. 35.29 × 98 =
  36. 36.3 × 19 =
  37. 37.12 × 19 =
  38. 38.7 × 49 =
  39. 39.4 × 98 =
  40. 40.20 × 99 =

Answer key

  1. 190
  2. 232
  3. 392
  4. 2376
  5. 392
  6. 133
  7. 3564
  8. 232
  9. 1287
  10. 152
  11. 126
  12. 54
  13. 3626
  14. 1862
  15. 228
  16. 319
  17. 1960
  18. 45
  19. 81
  20. 247
  21. 95
  22. 891
  23. 2744
  24. 980
  25. 377
  26. 108
  27. 232
  28. 784
  29. 27
  30. 2277
  31. 152
  32. 196
  33. 2574
  34. 539
  35. 2842
  36. 57
  37. 228
  38. 343
  39. 392
  40. 1980

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