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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 308 · 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 × 98 =
  2. 2.39 × 98 =
  3. 3.6 × 9 =
  4. 4.5 × 29 =
  5. 5.15 × 49 =
  6. 6.11 × 29 =
  7. 7.9 × 49 =
  8. 8.4 × 98 =
  9. 9.9 × 29 =
  10. 10.4 × 19 =
  11. 11.8 × 19 =
  12. 12.13 × 99 =
  13. 13.7 × 19 =
  14. 14.15 × 99 =
  15. 15.9 × 9 =
  16. 16.5 × 9 =
  17. 17.13 × 29 =
  18. 18.5 × 98 =
  19. 19.19 × 99 =
  20. 20.15 × 9 =
  21. 21.12 × 98 =
  22. 22.4 × 9 =
  23. 23.39 × 98 =
  24. 24.8 × 9 =
  25. 25.11 × 19 =
  26. 26.3 × 49 =
  27. 27.29 × 99 =
  28. 28.15 × 49 =
  29. 29.4 × 19 =
  30. 30.15 × 19 =
  31. 31.13 × 49 =
  32. 32.7 × 49 =
  33. 33.3 × 29 =
  34. 34.13 × 9 =
  35. 35.13 × 9 =
  36. 36.9 × 99 =
  37. 37.6 × 29 =
  38. 38.11 × 9 =
  39. 39.15 × 9 =
  40. 40.3 × 29 =

Answer key

  1. 294
  2. 3822
  3. 54
  4. 145
  5. 735
  6. 319
  7. 441
  8. 392
  9. 261
  10. 76
  11. 152
  12. 1287
  13. 133
  14. 1485
  15. 81
  16. 45
  17. 377
  18. 490
  19. 1881
  20. 135
  21. 1176
  22. 36
  23. 3822
  24. 72
  25. 209
  26. 147
  27. 2871
  28. 735
  29. 76
  30. 285
  31. 637
  32. 343
  33. 87
  34. 117
  35. 117
  36. 891
  37. 174
  38. 99
  39. 135
  40. 87

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