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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 38 · 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. 1.26 × 99 =
  2. 2.11 × 49 =
  3. 3.3 × 98 =
  4. 4.5 × 9 =
  5. 5.5 × 9 =
  6. 6.6 × 19 =
  7. 7.30 × 98 =
  8. 8.3 × 49 =
  9. 9.6 × 19 =
  10. 10.11 × 49 =
  11. 11.8 × 19 =
  12. 12.35 × 98 =
  13. 13.4 × 98 =
  14. 14.15 × 19 =
  15. 15.7 × 19 =
  16. 16.3 × 49 =
  17. 17.13 × 9 =
  18. 18.15 × 9 =
  19. 19.23 × 99 =
  20. 20.14 × 9 =
  21. 21.5 × 49 =
  22. 22.5 × 49 =
  23. 23.15 × 99 =
  24. 24.14 × 99 =
  25. 25.11 × 9 =
  26. 26.7 × 49 =
  27. 27.8 × 49 =
  28. 28.7 × 49 =
  29. 29.3 × 49 =
  30. 30.5 × 9 =
  31. 31.15 × 19 =
  32. 32.9 × 9 =
  33. 33.20 × 98 =
  34. 34.12 × 49 =
  35. 35.5 × 29 =
  36. 36.5 × 99 =
  37. 37.11 × 98 =
  38. 38.8 × 29 =
  39. 39.23 × 99 =
  40. 40.13 × 49 =

Answer key

  1. 2574
  2. 539
  3. 294
  4. 45
  5. 45
  6. 114
  7. 2940
  8. 147
  9. 114
  10. 539
  11. 152
  12. 3430
  13. 392
  14. 285
  15. 133
  16. 147
  17. 117
  18. 135
  19. 2277
  20. 126
  21. 245
  22. 245
  23. 1485
  24. 1386
  25. 99
  26. 343
  27. 392
  28. 343
  29. 147
  30. 45
  31. 285
  32. 81
  33. 1960
  34. 588
  35. 145
  36. 495
  37. 1078
  38. 232
  39. 2277
  40. 637

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