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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 720 · 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. 2.9 × 19 =
  3. 3.29 × 99 =
  4. 4.5 × 49 =
  5. 5.4 × 49 =
  6. 6.27 × 98 =
  7. 7.21 × 98 =
  8. 8.6 × 9 =
  9. 9.8 × 99 =
  10. 10.36 × 98 =
  11. 11.37 × 99 =
  12. 12.15 × 19 =
  13. 13.13 × 9 =
  14. 14.11 × 19 =
  15. 15.22 × 99 =
  16. 16.9 × 49 =
  17. 17.11 × 9 =
  18. 18.11 × 9 =
  19. 19.14 × 49 =
  20. 20.40 × 99 =
  21. 21.4 × 49 =
  22. 22.9 × 9 =
  23. 23.15 × 9 =
  24. 24.6 × 9 =
  25. 25.7 × 49 =
  26. 26.33 × 98 =
  27. 27.10 × 29 =
  28. 28.4 × 29 =
  29. 29.15 × 19 =
  30. 30.15 × 99 =
  31. 31.6 × 49 =
  32. 32.8 × 19 =
  33. 33.7 × 19 =
  34. 34.7 × 19 =
  35. 35.3 × 9 =
  36. 36.13 × 19 =
  37. 37.8 × 19 =
  38. 38.10 × 49 =
  39. 39.11 × 29 =
  40. 40.6 × 19 =

Answer key

  1. 171
  2. 171
  3. 2871
  4. 245
  5. 196
  6. 2646
  7. 2058
  8. 54
  9. 792
  10. 3528
  11. 3663
  12. 285
  13. 117
  14. 209
  15. 2178
  16. 441
  17. 99
  18. 99
  19. 686
  20. 3960
  21. 196
  22. 81
  23. 135
  24. 54
  25. 343
  26. 3234
  27. 290
  28. 116
  29. 285
  30. 1485
  31. 294
  32. 152
  33. 133
  34. 133
  35. 27
  36. 247
  37. 152
  38. 490
  39. 319
  40. 114

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