12 1/4 - (8+4 3/8) *(3 2/9 - 2 5/11)=
49/4 - (8+35/8)*(29/9 - 27/11)=
49/4 - 99/8 * 76/99= 49/4 - 19/2= 11/4 = 2 3/4
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2)
3)
4)
12 1/4 - (8+4 3/8) *(3 2/9 - 2 5/11)=
49/4 - (8+35/8)*(29/9 - 27/11)=
49/4 - 99/8 * 76/99= 49/4 - 19/2= 11/4 = 2 3/4
1)![8+4\frac{3}{8}=8+\frac{35}{8}=\frac{64+35}{8}=\frac{99}{8}=12\frac{3}{8}](/tpl/images/0040/1776/9d10e.png)
2)![3\frac{2}{9}-2\frac{5}{11}=\frac{29}{9}-\frac{27}{11}=\frac{319-243}{99}=\frac{76}{99}](/tpl/images/0040/1776/3c05b.png)
3)![12\frac{3}{8}\cdot\frac{76}{99}=\frac{99}{8}\cdot\frac{76}{99}=\frac{76}{8}=\frac{19}{2}= 9\frac{1}{2}](/tpl/images/0040/1776/3d4b8.png)
4)![12\frac{1}{4}-9\frac{1}{2}=\frac{49}{4}-\frac{19}{2}=\frac{49-38}{4}=\frac{11}{4}=2\frac{3}{4}](/tpl/images/0040/1776/50b2f.png)