Question

$5 \frac{7}{9} - 1 \frac{1}{10} - 7 \frac{11}{15}$
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Answer 1

Step-by-step explanation:

1. 5(7/3) - 1(1/10) - 7(11/15
2. 22/3 - 11/10 - 116/15
3. (220 - 33 - 232 ) / 30
4. - 45/30
5. 3/2

Answer 2

$\tt 5\frac{7}{9} - \tt 1\frac{1}{10} - \tt 7\frac{11}{15}$

$= \tt \frac {5 \times 9 + 7}{9} \\ = \tt \frac {52}{9}$

$= \tt \frac {1 \times 10 + 1}{10} \\ = \tt \frac {11}{10}$

$= \tt \frac {7 \times 15 + 11}{15} \\ = \tt \frac {116}{15}$

So $= \tt \frac {52}{9} - \tt \frac {11}{10} - \tt \frac {116}{15}$

So $= \tt \frac {520 - 99 - 696}{90} \\ = \tt \frac {421 - 696}{90}$ = ${\boxed{\tt{\frac{-275}{90}}}}$