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Study of the semileptonic charm decays<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>D</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:mo>→</mml:mo><mml:msup><mml:mi>π</mml:mi><mml:mo>−</mml:mo></mml:msup><mml:msup><mml:mi>e</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msub><mml:mi>ν</mml:mi><mml:mi>e</mml:mi></mml:msub></mml:math>,<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>D</mml:mi><mml:mo>+</mml:mo></mml:…

Using a sample of 1.8 million DD¯ mesons collected at the ψ(3770) with the CLEO-c detector, we study the semileptonic decays D0→π−e+νe, D+→π0e+νe, D0→K−e+νe, and D+→K¯0e+νe. For the total branching fractions we find B(D0→π−e+νe)=0.299(11)(9)%, B(D+→π0e+νe)=0.373(22)(13)%, B(D0→K−e+νe)=3.56(3)(9)%, and B(D+→K¯0e+νe)=8.53(13)(23)%, where the first error is statistical and the second systematic. In addition, …