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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 543 · 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. 1.8 × 49 =
  2. 2.28 × 99 =
  3. 3.7 × 49 =
  4. 4.11 × 29 =
  5. 5.4 × 19 =
  6. 6.7 × 19 =
  7. 7.6 × 98 =
  8. 8.11 × 49 =
  9. 9.24 × 99 =
  10. 10.10 × 19 =
  11. 11.29 × 98 =
  12. 12.9 × 29 =
  13. 13.30 × 99 =
  14. 14.8 × 9 =
  15. 15.21 × 99 =
  16. 16.7 × 9 =
  17. 17.12 × 29 =
  18. 18.12 × 9 =
  19. 19.8 × 19 =
  20. 20.4 × 9 =
  21. 21.8 × 19 =
  22. 22.7 × 49 =
  23. 23.12 × 19 =
  24. 24.4 × 29 =
  25. 25.6 × 9 =
  26. 26.12 × 19 =
  27. 27.31 × 99 =
  28. 28.6 × 29 =
  29. 29.10 × 19 =
  30. 30.5 × 29 =
  31. 31.4 × 9 =
  32. 32.8 × 9 =
  33. 33.22 × 98 =
  34. 34.6 × 19 =
  35. 35.36 × 99 =
  36. 36.12 × 98 =
  37. 37.5 × 98 =
  38. 38.8 × 29 =
  39. 39.13 × 29 =
  40. 40.7 × 49 =

Answer key

  1. 392
  2. 2772
  3. 343
  4. 319
  5. 76
  6. 133
  7. 588
  8. 539
  9. 2376
  10. 190
  11. 2842
  12. 261
  13. 2970
  14. 72
  15. 2079
  16. 63
  17. 348
  18. 108
  19. 152
  20. 36
  21. 152
  22. 343
  23. 228
  24. 116
  25. 54
  26. 228
  27. 3069
  28. 174
  29. 190
  30. 145
  31. 36
  32. 72
  33. 2156
  34. 114
  35. 3564
  36. 1176
  37. 490
  38. 232
  39. 377
  40. 343

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