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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 11 · 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. 1.12 × 9 =
  2. 2.13 × 49 =
  3. 3.4 × 19 =
  4. 4.22 × 98 =
  5. 5.6 × 19 =
  6. 6.10 × 9 =
  7. 7.14 × 29 =
  8. 8.25 × 99 =
  9. 9.5 × 9 =
  10. 10.18 × 98 =
  11. 11.4 × 9 =
  12. 12.14 × 49 =
  13. 13.13 × 29 =
  14. 14.14 × 19 =
  15. 15.9 × 9 =
  16. 16.8 × 29 =
  17. 17.21 × 99 =
  18. 18.26 × 98 =
  19. 19.26 × 98 =
  20. 20.16 × 99 =
  21. 21.24 × 98 =
  22. 22.14 × 29 =
  23. 23.5 × 19 =
  24. 24.11 × 9 =
  25. 25.27 × 99 =
  26. 26.3 × 49 =
  27. 27.13 × 19 =
  28. 28.19 × 99 =
  29. 29.11 × 9 =
  30. 30.12 × 49 =
  31. 31.7 × 98 =
  32. 32.7 × 29 =
  33. 33.11 × 99 =
  34. 34.13 × 49 =
  35. 35.12 × 29 =
  36. 36.13 × 98 =
  37. 37.4 × 49 =
  38. 38.6 × 9 =
  39. 39.14 × 9 =
  40. 40.14 × 99 =

Answer key

  1. 108
  2. 637
  3. 76
  4. 2156
  5. 114
  6. 90
  7. 406
  8. 2475
  9. 45
  10. 1764
  11. 36
  12. 686
  13. 377
  14. 266
  15. 81
  16. 232
  17. 2079
  18. 2548
  19. 2548
  20. 1584
  21. 2352
  22. 406
  23. 95
  24. 99
  25. 2673
  26. 147
  27. 247
  28. 1881
  29. 99
  30. 588
  31. 686
  32. 203
  33. 1089
  34. 637
  35. 348
  36. 1274
  37. 196
  38. 54
  39. 126
  40. 1386

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