2.
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$$|-5,6|+|-4,2|=5,6+4,2=9,8$$
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$$|-5,04|:|3,6|=5,04:3,6=1,4$$
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$$|-3\frac{7}{11}|-|-1\frac{15}{22}|=\frac{40}{11}-\frac{37}{22}=\frac{40 \cdot 2 - 37}{22} = \frac{80-37}{22}=\frac{43}{22}=1\frac{21}{22}$$
Ответ: а) 9,8; б) 1,4; в) $$1\frac{21}{22}$$