What should be added to $$ {10 \ over 11} $$ to get the sum $$ {11 \ over 10} $$?
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Q:
What should be added to $$ {10 \ over 11} $$ to get the sum $$ {11 \ over 10} $$?
- 1$$ {1\over 55}$$false
- 2$$ {2\over 11}$$false
- 3$$ {21\over 110}$$true
- 4$$ {1\over 5}$$false
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