$1\frac{1}{2}+2\frac{1}{4}-3\frac{3}{4}=?$

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A3/4

B7 1/2

C1/2

Answer:

$1\frac{1}{2}+2\frac{1}{4}-3\frac{3}{4}=$

$\frac32+\frac94-\frac{15}{4}$

$=\frac64+\frac94-\frac{15}4$

$=\frac{15}{4}-\frac{15}{4}=0$

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