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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 744 · 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. 1.5 × 49 =
  2. 2.8 × 9 =
  3. 3.20 × 99 =
  4. 4.12 × 98 =
  5. 5.12 × 9 =
  6. 6.39 × 98 =
  7. 7.7 × 9 =
  8. 8.28 × 98 =
  9. 9.22 × 98 =
  10. 10.31 × 99 =
  11. 11.12 × 29 =
  12. 12.4 × 19 =
  13. 13.30 × 98 =
  14. 14.9 × 19 =
  15. 15.9 × 9 =
  16. 16.4 × 9 =
  17. 17.28 × 99 =
  18. 18.6 × 9 =
  19. 19.8 × 19 =
  20. 20.4 × 9 =
  21. 21.10 × 9 =
  22. 22.9 × 98 =
  23. 23.15 × 9 =
  24. 24.15 × 9 =
  25. 25.14 × 19 =
  26. 26.4 × 99 =
  27. 27.11 × 9 =
  28. 28.6 × 9 =
  29. 29.12 × 29 =
  30. 30.5 × 49 =
  31. 31.7 × 49 =
  32. 32.12 × 49 =
  33. 33.13 × 98 =
  34. 34.6 × 9 =
  35. 35.13 × 49 =
  36. 36.5 × 29 =
  37. 37.7 × 98 =
  38. 38.6 × 19 =
  39. 39.27 × 99 =
  40. 40.7 × 9 =

Answer key

  1. 245
  2. 72
  3. 1980
  4. 1176
  5. 108
  6. 3822
  7. 63
  8. 2744
  9. 2156
  10. 3069
  11. 348
  12. 76
  13. 2940
  14. 171
  15. 81
  16. 36
  17. 2772
  18. 54
  19. 152
  20. 36
  21. 90
  22. 882
  23. 135
  24. 135
  25. 266
  26. 396
  27. 99
  28. 54
  29. 348
  30. 245
  31. 343
  32. 588
  33. 1274
  34. 54
  35. 637
  36. 145
  37. 686
  38. 114
  39. 2673
  40. 63

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