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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 349 · 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. 1.9 × 19 =
  2. 2.10 × 49 =
  3. 3.35 × 99 =
  4. 4.13 × 29 =
  5. 5.6 × 49 =
  6. 6.14 × 29 =
  7. 7.5 × 19 =
  8. 8.13 × 98 =
  9. 9.4 × 9 =
  10. 10.5 × 19 =
  11. 11.5 × 19 =
  12. 12.32 × 99 =
  13. 13.11 × 19 =
  14. 14.8 × 29 =
  15. 15.38 × 98 =
  16. 16.10 × 29 =
  17. 17.10 × 9 =
  18. 18.9 × 49 =
  19. 19.4 × 9 =
  20. 20.11 × 19 =
  21. 21.40 × 98 =
  22. 22.12 × 29 =
  23. 23.14 × 9 =
  24. 24.4 × 19 =
  25. 25.7 × 19 =
  26. 26.11 × 9 =
  27. 27.15 × 29 =
  28. 28.3 × 9 =
  29. 29.3 × 9 =
  30. 30.8 × 29 =
  31. 31.13 × 29 =
  32. 32.5 × 19 =
  33. 33.7 × 98 =
  34. 34.6 × 49 =
  35. 35.3 × 9 =
  36. 36.11 × 99 =
  37. 37.6 × 9 =
  38. 38.29 × 98 =
  39. 39.34 × 98 =
  40. 40.5 × 9 =

Answer key

  1. 171
  2. 490
  3. 3465
  4. 377
  5. 294
  6. 406
  7. 95
  8. 1274
  9. 36
  10. 95
  11. 95
  12. 3168
  13. 209
  14. 232
  15. 3724
  16. 290
  17. 90
  18. 441
  19. 36
  20. 209
  21. 3920
  22. 348
  23. 126
  24. 76
  25. 133
  26. 99
  27. 435
  28. 27
  29. 27
  30. 232
  31. 377
  32. 95
  33. 686
  34. 294
  35. 27
  36. 1089
  37. 54
  38. 2842
  39. 3332
  40. 45

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