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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 390 · 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. 1.6 × 29 =
  2. 2.9 × 9 =
  3. 3.5 × 9 =
  4. 4.10 × 49 =
  5. 5.8 × 19 =
  6. 6.9 × 19 =
  7. 7.18 × 98 =
  8. 8.6 × 49 =
  9. 9.26 × 99 =
  10. 10.11 × 9 =
  11. 11.16 × 98 =
  12. 12.15 × 99 =
  13. 13.14 × 29 =
  14. 14.11 × 19 =
  15. 15.7 × 49 =
  16. 16.7 × 49 =
  17. 17.13 × 9 =
  18. 18.36 × 98 =
  19. 19.12 × 49 =
  20. 20.40 × 98 =
  21. 21.4 × 49 =
  22. 22.15 × 29 =
  23. 23.4 × 19 =
  24. 24.3 × 19 =
  25. 25.10 × 29 =
  26. 26.14 × 49 =
  27. 27.14 × 29 =
  28. 28.7 × 19 =
  29. 29.15 × 29 =
  30. 30.9 × 29 =
  31. 31.7 × 19 =
  32. 32.5 × 19 =
  33. 33.3 × 49 =
  34. 34.5 × 99 =
  35. 35.5 × 9 =
  36. 36.15 × 19 =
  37. 37.8 × 49 =
  38. 38.4 × 49 =
  39. 39.8 × 99 =
  40. 40.9 × 19 =

Answer key

  1. 174
  2. 81
  3. 45
  4. 490
  5. 152
  6. 171
  7. 1764
  8. 294
  9. 2574
  10. 99
  11. 1568
  12. 1485
  13. 406
  14. 209
  15. 343
  16. 343
  17. 117
  18. 3528
  19. 588
  20. 3920
  21. 196
  22. 435
  23. 76
  24. 57
  25. 290
  26. 686
  27. 406
  28. 133
  29. 435
  30. 261
  31. 133
  32. 95
  33. 147
  34. 495
  35. 45
  36. 285
  37. 392
  38. 196
  39. 792
  40. 171

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