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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 120 · 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 × 9 =
  2. 2.38 × 99 =
  3. 3.7 × 9 =
  4. 4.7 × 19 =
  5. 5.9 × 9 =
  6. 6.14 × 19 =
  7. 7.15 × 29 =
  8. 8.14 × 19 =
  9. 9.14 × 98 =
  10. 10.12 × 9 =
  11. 11.6 × 9 =
  12. 12.10 × 49 =
  13. 13.9 × 9 =
  14. 14.26 × 99 =
  15. 15.5 × 19 =
  16. 16.7 × 29 =
  17. 17.12 × 49 =
  18. 18.26 × 98 =
  19. 19.9 × 9 =
  20. 20.15 × 98 =
  21. 21.17 × 99 =
  22. 22.39 × 98 =
  23. 23.6 × 49 =
  24. 24.13 × 49 =
  25. 25.13 × 19 =
  26. 26.19 × 99 =
  27. 27.8 × 29 =
  28. 28.14 × 9 =
  29. 29.28 × 98 =
  30. 30.13 × 9 =
  31. 31.4 × 9 =
  32. 32.21 × 99 =
  33. 33.22 × 98 =
  34. 34.7 × 29 =
  35. 35.4 × 98 =
  36. 36.14 × 49 =
  37. 37.13 × 9 =
  38. 38.6 × 19 =
  39. 39.9 × 99 =
  40. 40.22 × 98 =

Answer key

  1. 72
  2. 3762
  3. 63
  4. 133
  5. 81
  6. 266
  7. 435
  8. 266
  9. 1372
  10. 108
  11. 54
  12. 490
  13. 81
  14. 2574
  15. 95
  16. 203
  17. 588
  18. 2548
  19. 81
  20. 1470
  21. 1683
  22. 3822
  23. 294
  24. 637
  25. 247
  26. 1881
  27. 232
  28. 126
  29. 2744
  30. 117
  31. 36
  32. 2079
  33. 2156
  34. 203
  35. 392
  36. 686
  37. 117
  38. 114
  39. 891
  40. 2156

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