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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 556 · 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. 1.21 × 99 =
  2. 2.11 × 98 =
  3. 3.4 × 9 =
  4. 4.8 × 9 =
  5. 5.13 × 49 =
  6. 6.3 × 49 =
  7. 7.36 × 98 =
  8. 8.32 × 98 =
  9. 9.10 × 49 =
  10. 10.13 × 9 =
  11. 11.22 × 99 =
  12. 12.9 × 49 =
  13. 13.6 × 99 =
  14. 14.28 × 99 =
  15. 15.14 × 98 =
  16. 16.15 × 9 =
  17. 17.4 × 19 =
  18. 18.12 × 9 =
  19. 19.8 × 9 =
  20. 20.6 × 9 =
  21. 21.15 × 49 =
  22. 22.9 × 19 =
  23. 23.8 × 19 =
  24. 24.5 × 99 =
  25. 25.9 × 29 =
  26. 26.22 × 98 =
  27. 27.4 × 49 =
  28. 28.12 × 9 =
  29. 29.14 × 9 =
  30. 30.12 × 9 =
  31. 31.4 × 49 =
  32. 32.13 × 29 =
  33. 33.6 × 49 =
  34. 34.29 × 98 =
  35. 35.5 × 9 =
  36. 36.6 × 9 =
  37. 37.12 × 99 =
  38. 38.7 × 19 =
  39. 39.4 × 9 =
  40. 40.12 × 19 =

Answer key

  1. 2079
  2. 1078
  3. 36
  4. 72
  5. 637
  6. 147
  7. 3528
  8. 3136
  9. 490
  10. 117
  11. 2178
  12. 441
  13. 594
  14. 2772
  15. 1372
  16. 135
  17. 76
  18. 108
  19. 72
  20. 54
  21. 735
  22. 171
  23. 152
  24. 495
  25. 261
  26. 2156
  27. 196
  28. 108
  29. 126
  30. 108
  31. 196
  32. 377
  33. 294
  34. 2842
  35. 45
  36. 54
  37. 1188
  38. 133
  39. 36
  40. 228

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