689. Вычислите: 1) 5 + 8/16 + 5/24; 2) 4/81 + 1 13/27 + 2; 3) 1 1/2 + 4 1/4 + 3 1/4; 4) 8 5/9 + 2 7/18 + 6 11/36; 5) 13 11/25 + 10 7/15 + 9 13/18; 6) 27 13/15 + 11 7/12 + 19 11/20.

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Accepted Answer

\(5+\frac{8}{16}+\frac{5}{24}=5+\frac12+\frac5{24}=5+\frac{12}{24}+\frac5{24}=5\frac{17}{24}\).
\(\frac4{81}+1\frac{13}{27}+2=3+\frac4{81}+\frac{39}{81}=3\frac{43}{81}\).
\(1\frac12+4\frac14+3\frac14=8+\frac24+\frac14=8\frac34\).
\(8\frac59+2\frac7{18}+6\frac{11}{36}=16+\frac{20}{36}+\frac{14}{36}+\frac{11}{36}=16\frac{45}{36}=17\frac14\).
\(13\frac{11}{25}+10\frac7{15}+9\frac{13}{18}=32+\frac{198}{450}+\frac{210}{450}+\frac{325}{450}=33\frac{733}{450}=33\frac{283}{450}\).
\(27\frac{13}{15}+11\frac7{12}+19\frac{11}{20}=57+\frac{52}{60}+\frac{35}{60}+\frac{33}{60}=59\).

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