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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 28 · 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. 2.8 × 29 =
  3. 3.10 × 9 =
  4. 4.40 × 98 =
  5. 5.16 × 99 =
  6. 6.8 × 49 =
  7. 7.21 × 99 =
  8. 8.14 × 29 =
  9. 9.9 × 19 =
  10. 10.6 × 9 =
  11. 11.14 × 99 =
  12. 12.21 × 98 =
  13. 13.13 × 19 =
  14. 14.14 × 29 =
  15. 15.3 × 29 =
  16. 16.4 × 49 =
  17. 17.11 × 29 =
  18. 18.13 × 19 =
  19. 19.12 × 49 =
  20. 20.19 × 98 =
  21. 21.23 × 99 =
  22. 22.4 × 9 =
  23. 23.5 × 19 =
  24. 24.4 × 29 =
  25. 25.35 × 99 =
  26. 26.10 × 29 =
  27. 27.11 × 9 =
  28. 28.6 × 49 =
  29. 29.12 × 9 =
  30. 30.11 × 29 =
  31. 31.10 × 9 =
  32. 32.8 × 29 =
  33. 33.5 × 49 =
  34. 34.4 × 19 =
  35. 35.8 × 29 =
  36. 36.10 × 49 =
  37. 37.10 × 98 =
  38. 38.8 × 9 =
  39. 39.3 × 9 =
  40. 40.12 × 9 =

Answer key

  1. 108
  2. 232
  3. 90
  4. 3920
  5. 1584
  6. 392
  7. 2079
  8. 406
  9. 171
  10. 54
  11. 1386
  12. 2058
  13. 247
  14. 406
  15. 87
  16. 196
  17. 319
  18. 247
  19. 588
  20. 1862
  21. 2277
  22. 36
  23. 95
  24. 116
  25. 3465
  26. 290
  27. 99
  28. 294
  29. 108
  30. 319
  31. 90
  32. 232
  33. 245
  34. 76
  35. 232
  36. 490
  37. 980
  38. 72
  39. 27
  40. 108

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