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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 794 · 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. 1.35 × 98 =
  2. 2.10 × 49 =
  3. 3.3 × 19 =
  4. 4.15 × 49 =
  5. 5.9 × 9 =
  6. 6.19 × 98 =
  7. 7.15 × 99 =
  8. 8.12 × 9 =
  9. 9.26 × 99 =
  10. 10.7 × 98 =
  11. 11.9 × 49 =
  12. 12.14 × 29 =
  13. 13.4 × 49 =
  14. 14.8 × 19 =
  15. 15.9 × 98 =
  16. 16.4 × 29 =
  17. 17.8 × 49 =
  18. 18.4 × 19 =
  19. 19.10 × 49 =
  20. 20.37 × 98 =
  21. 21.3 × 29 =
  22. 22.3 × 9 =
  23. 23.10 × 19 =
  24. 24.6 × 29 =
  25. 25.8 × 19 =
  26. 26.14 × 49 =
  27. 27.34 × 98 =
  28. 28.24 × 99 =
  29. 29.15 × 98 =
  30. 30.5 × 49 =
  31. 31.8 × 9 =
  32. 32.32 × 99 =
  33. 33.10 × 49 =
  34. 34.39 × 99 =
  35. 35.40 × 98 =
  36. 36.4 × 49 =
  37. 37.15 × 9 =
  38. 38.14 × 49 =
  39. 39.12 × 99 =
  40. 40.14 × 29 =

Answer key

  1. 3430
  2. 490
  3. 57
  4. 735
  5. 81
  6. 1862
  7. 1485
  8. 108
  9. 2574
  10. 686
  11. 441
  12. 406
  13. 196
  14. 152
  15. 882
  16. 116
  17. 392
  18. 76
  19. 490
  20. 3626
  21. 87
  22. 27
  23. 190
  24. 174
  25. 152
  26. 686
  27. 3332
  28. 2376
  29. 1470
  30. 245
  31. 72
  32. 3168
  33. 490
  34. 3861
  35. 3920
  36. 196
  37. 135
  38. 686
  39. 1188
  40. 406

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