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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 415 · 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. 1.3 × 49 =
  2. 2.6 × 9 =
  3. 3.3 × 49 =
  4. 4.6 × 19 =
  5. 5.5 × 9 =
  6. 6.15 × 29 =
  7. 7.6 × 19 =
  8. 8.9 × 98 =
  9. 9.3 × 19 =
  10. 10.15 × 49 =
  11. 11.4 × 9 =
  12. 12.40 × 98 =
  13. 13.34 × 98 =
  14. 14.11 × 49 =
  15. 15.40 × 98 =
  16. 16.7 × 9 =
  17. 17.9 × 9 =
  18. 18.6 × 9 =
  19. 19.4 × 9 =
  20. 20.9 × 49 =
  21. 21.14 × 98 =
  22. 22.3 × 49 =
  23. 23.14 × 9 =
  24. 24.8 × 19 =
  25. 25.5 × 9 =
  26. 26.32 × 98 =
  27. 27.35 × 98 =
  28. 28.4 × 9 =
  29. 29.9 × 9 =
  30. 30.11 × 98 =
  31. 31.7 × 9 =
  32. 32.36 × 98 =
  33. 33.9 × 19 =
  34. 34.12 × 29 =
  35. 35.5 × 19 =
  36. 36.4 × 9 =
  37. 37.11 × 9 =
  38. 38.13 × 99 =
  39. 39.37 × 99 =
  40. 40.7 × 19 =

Answer key

  1. 147
  2. 54
  3. 147
  4. 114
  5. 45
  6. 435
  7. 114
  8. 882
  9. 57
  10. 735
  11. 36
  12. 3920
  13. 3332
  14. 539
  15. 3920
  16. 63
  17. 81
  18. 54
  19. 36
  20. 441
  21. 1372
  22. 147
  23. 126
  24. 152
  25. 45
  26. 3136
  27. 3430
  28. 36
  29. 81
  30. 1078
  31. 63
  32. 3528
  33. 171
  34. 348
  35. 95
  36. 36
  37. 99
  38. 1287
  39. 3663
  40. 133

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