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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 707 · 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. 1.39 × 99 =
  2. 2.11 × 19 =
  3. 3.10 × 99 =
  4. 4.32 × 99 =
  5. 5.6 × 19 =
  6. 6.6 × 9 =
  7. 7.3 × 9 =
  8. 8.11 × 19 =
  9. 9.28 × 99 =
  10. 10.12 × 19 =
  11. 11.7 × 29 =
  12. 12.13 × 9 =
  13. 13.13 × 49 =
  14. 14.6 × 49 =
  15. 15.15 × 49 =
  16. 16.9 × 98 =
  17. 17.11 × 9 =
  18. 18.10 × 49 =
  19. 19.13 × 9 =
  20. 20.15 × 29 =
  21. 21.8 × 9 =
  22. 22.20 × 99 =
  23. 23.6 × 9 =
  24. 24.3 × 29 =
  25. 25.5 × 49 =
  26. 26.7 × 29 =
  27. 27.3 × 29 =
  28. 28.37 × 99 =
  29. 29.7 × 9 =
  30. 30.8 × 9 =
  31. 31.32 × 98 =
  32. 32.14 × 99 =
  33. 33.14 × 49 =
  34. 34.26 × 98 =
  35. 35.10 × 49 =
  36. 36.15 × 99 =
  37. 37.15 × 9 =
  38. 38.23 × 98 =
  39. 39.15 × 9 =
  40. 40.24 × 98 =

Answer key

  1. 3861
  2. 209
  3. 990
  4. 3168
  5. 114
  6. 54
  7. 27
  8. 209
  9. 2772
  10. 228
  11. 203
  12. 117
  13. 637
  14. 294
  15. 735
  16. 882
  17. 99
  18. 490
  19. 117
  20. 435
  21. 72
  22. 1980
  23. 54
  24. 87
  25. 245
  26. 203
  27. 87
  28. 3663
  29. 63
  30. 72
  31. 3136
  32. 1386
  33. 686
  34. 2548
  35. 490
  36. 1485
  37. 135
  38. 2254
  39. 135
  40. 2352

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