(-1/2)-|(-1/4)-(1/3)|等于几

(-1/2)-|(-1/4)-(1/3)|等于几
(-1/2)-|(-1/4)-(1/3)|等于几

(-1/2)-|(-1/4)-(1/3)|等于几
(-1/2)-|(-1/4)-(1/3)|等于几
=-1/2-(1/3+1/4)
=-6/12-4/12-3/12
=-13/12;
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