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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 749 · 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. 1.23 × 99 =
  2. 2.12 × 29 =
  3. 3.13 × 29 =
  4. 4.4 × 9 =
  5. 5.10 × 19 =
  6. 6.5 × 49 =
  7. 7.7 × 49 =
  8. 8.3 × 9 =
  9. 9.6 × 9 =
  10. 10.4 × 9 =
  11. 11.5 × 9 =
  12. 12.12 × 19 =
  13. 13.7 × 19 =
  14. 14.15 × 29 =
  15. 15.5 × 19 =
  16. 16.9 × 98 =
  17. 17.19 × 99 =
  18. 18.13 × 49 =
  19. 19.6 × 49 =
  20. 20.5 × 9 =
  21. 21.11 × 9 =
  22. 22.9 × 19 =
  23. 23.23 × 99 =
  24. 24.11 × 9 =
  25. 25.8 × 9 =
  26. 26.3 × 29 =
  27. 27.6 × 49 =
  28. 28.9 × 49 =
  29. 29.7 × 49 =
  30. 30.9 × 49 =
  31. 31.9 × 29 =
  32. 32.28 × 98 =
  33. 33.5 × 49 =
  34. 34.5 × 49 =
  35. 35.15 × 19 =
  36. 36.25 × 99 =
  37. 37.11 × 99 =
  38. 38.14 × 9 =
  39. 39.5 × 49 =
  40. 40.13 × 19 =

Answer key

  1. 2277
  2. 348
  3. 377
  4. 36
  5. 190
  6. 245
  7. 343
  8. 27
  9. 54
  10. 36
  11. 45
  12. 228
  13. 133
  14. 435
  15. 95
  16. 882
  17. 1881
  18. 637
  19. 294
  20. 45
  21. 99
  22. 171
  23. 2277
  24. 99
  25. 72
  26. 87
  27. 294
  28. 441
  29. 343
  30. 441
  31. 261
  32. 2744
  33. 245
  34. 245
  35. 285
  36. 2475
  37. 1089
  38. 126
  39. 245
  40. 247

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