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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 660 · 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. 1.38 × 98 =
  2. 2.5 × 19 =
  3. 3.3 × 19 =
  4. 4.5 × 19 =
  5. 5.39 × 98 =
  6. 6.4 × 19 =
  7. 7.18 × 98 =
  8. 8.10 × 9 =
  9. 9.31 × 99 =
  10. 10.8 × 49 =
  11. 11.40 × 98 =
  12. 12.4 × 29 =
  13. 13.20 × 99 =
  14. 14.5 × 49 =
  15. 15.13 × 19 =
  16. 16.10 × 49 =
  17. 17.3 × 49 =
  18. 18.34 × 98 =
  19. 19.36 × 99 =
  20. 20.13 × 98 =
  21. 21.14 × 9 =
  22. 22.3 × 29 =
  23. 23.12 × 19 =
  24. 24.4 × 9 =
  25. 25.16 × 98 =
  26. 26.35 × 98 =
  27. 27.4 × 29 =
  28. 28.8 × 99 =
  29. 29.7 × 9 =
  30. 30.8 × 29 =
  31. 31.15 × 9 =
  32. 32.11 × 19 =
  33. 33.7 × 29 =
  34. 34.4 × 19 =
  35. 35.18 × 98 =
  36. 36.11 × 29 =
  37. 37.14 × 9 =
  38. 38.6 × 98 =
  39. 39.3 × 19 =
  40. 40.6 × 9 =

Answer key

  1. 3724
  2. 95
  3. 57
  4. 95
  5. 3822
  6. 76
  7. 1764
  8. 90
  9. 3069
  10. 392
  11. 3920
  12. 116
  13. 1980
  14. 245
  15. 247
  16. 490
  17. 147
  18. 3332
  19. 3564
  20. 1274
  21. 126
  22. 87
  23. 228
  24. 36
  25. 1568
  26. 3430
  27. 116
  28. 792
  29. 63
  30. 232
  31. 135
  32. 209
  33. 203
  34. 76
  35. 1764
  36. 319
  37. 126
  38. 588
  39. 57
  40. 54

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