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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 737 · 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 × 29 =
  2. 2.8 × 19 =
  3. 3.3 × 19 =
  4. 4.8 × 9 =
  5. 5.6 × 49 =
  6. 6.11 × 19 =
  7. 7.33 × 98 =
  8. 8.9 × 19 =
  9. 9.10 × 19 =
  10. 10.13 × 98 =
  11. 11.4 × 19 =
  12. 12.5 × 9 =
  13. 13.12 × 98 =
  14. 14.9 × 29 =
  15. 15.3 × 49 =
  16. 16.10 × 29 =
  17. 17.9 × 99 =
  18. 18.12 × 98 =
  19. 19.33 × 99 =
  20. 20.12 × 19 =
  21. 21.15 × 99 =
  22. 22.39 × 98 =
  23. 23.36 × 98 =
  24. 24.19 × 99 =
  25. 25.13 × 29 =
  26. 26.14 × 98 =
  27. 27.14 × 9 =
  28. 28.14 × 29 =
  29. 29.4 × 9 =
  30. 30.3 × 29 =
  31. 31.8 × 19 =
  32. 32.8 × 49 =
  33. 33.4 × 9 =
  34. 34.10 × 19 =
  35. 35.8 × 99 =
  36. 36.11 × 19 =
  37. 37.11 × 9 =
  38. 38.8 × 19 =
  39. 39.14 × 29 =
  40. 40.5 × 29 =

Answer key

  1. 87
  2. 152
  3. 57
  4. 72
  5. 294
  6. 209
  7. 3234
  8. 171
  9. 190
  10. 1274
  11. 76
  12. 45
  13. 1176
  14. 261
  15. 147
  16. 290
  17. 891
  18. 1176
  19. 3267
  20. 228
  21. 1485
  22. 3822
  23. 3528
  24. 1881
  25. 377
  26. 1372
  27. 126
  28. 406
  29. 36
  30. 87
  31. 152
  32. 392
  33. 36
  34. 190
  35. 792
  36. 209
  37. 99
  38. 152
  39. 406
  40. 145

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