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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 636 · 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. 1.22 × 98 =
  2. 2.8 × 19 =
  3. 3.23 × 98 =
  4. 4.3 × 19 =
  5. 5.8 × 19 =
  6. 6.11 × 49 =
  7. 7.7 × 19 =
  8. 8.9 × 49 =
  9. 9.7 × 19 =
  10. 10.15 × 19 =
  11. 11.7 × 49 =
  12. 12.10 × 98 =
  13. 13.6 × 9 =
  14. 14.9 × 19 =
  15. 15.12 × 9 =
  16. 16.12 × 19 =
  17. 17.11 × 19 =
  18. 18.3 × 29 =
  19. 19.14 × 29 =
  20. 20.5 × 49 =
  21. 21.4 × 9 =
  22. 22.3 × 9 =
  23. 23.11 × 29 =
  24. 24.15 × 29 =
  25. 25.36 × 98 =
  26. 26.5 × 29 =
  27. 27.35 × 98 =
  28. 28.5 × 9 =
  29. 29.24 × 98 =
  30. 30.9 × 19 =
  31. 31.19 × 99 =
  32. 32.39 × 98 =
  33. 33.28 × 99 =
  34. 34.26 × 99 =
  35. 35.38 × 98 =
  36. 36.13 × 99 =
  37. 37.12 × 29 =
  38. 38.12 × 19 =
  39. 39.15 × 9 =
  40. 40.8 × 98 =

Answer key

  1. 2156
  2. 152
  3. 2254
  4. 57
  5. 152
  6. 539
  7. 133
  8. 441
  9. 133
  10. 285
  11. 343
  12. 980
  13. 54
  14. 171
  15. 108
  16. 228
  17. 209
  18. 87
  19. 406
  20. 245
  21. 36
  22. 27
  23. 319
  24. 435
  25. 3528
  26. 145
  27. 3430
  28. 45
  29. 2352
  30. 171
  31. 1881
  32. 3822
  33. 2772
  34. 2574
  35. 3724
  36. 1287
  37. 348
  38. 228
  39. 135
  40. 784

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