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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 232 · 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. 1.3 × 29 =
  2. 2.6 × 49 =
  3. 3.24 × 98 =
  4. 4.10 × 98 =
  5. 5.12 × 19 =
  6. 6.29 × 98 =
  7. 7.38 × 99 =
  8. 8.14 × 29 =
  9. 9.7 × 98 =
  10. 10.6 × 9 =
  11. 11.3 × 19 =
  12. 12.4 × 19 =
  13. 13.9 × 9 =
  14. 14.5 × 19 =
  15. 15.12 × 19 =
  16. 16.11 × 29 =
  17. 17.7 × 29 =
  18. 18.14 × 29 =
  19. 19.13 × 49 =
  20. 20.13 × 49 =
  21. 21.15 × 9 =
  22. 22.24 × 99 =
  23. 23.6 × 29 =
  24. 24.7 × 49 =
  25. 25.23 × 99 =
  26. 26.15 × 9 =
  27. 27.9 × 29 =
  28. 28.29 × 98 =
  29. 29.23 × 99 =
  30. 30.9 × 29 =
  31. 31.39 × 98 =
  32. 32.6 × 9 =
  33. 33.5 × 29 =
  34. 34.16 × 98 =
  35. 35.3 × 9 =
  36. 36.26 × 98 =
  37. 37.5 × 99 =
  38. 38.5 × 98 =
  39. 39.37 × 99 =
  40. 40.5 × 9 =

Answer key

  1. 87
  2. 294
  3. 2352
  4. 980
  5. 228
  6. 2842
  7. 3762
  8. 406
  9. 686
  10. 54
  11. 57
  12. 76
  13. 81
  14. 95
  15. 228
  16. 319
  17. 203
  18. 406
  19. 637
  20. 637
  21. 135
  22. 2376
  23. 174
  24. 343
  25. 2277
  26. 135
  27. 261
  28. 2842
  29. 2277
  30. 261
  31. 3822
  32. 54
  33. 145
  34. 1568
  35. 27
  36. 2548
  37. 495
  38. 490
  39. 3663
  40. 45

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