а) |-3,6| : |-18| = 3,6 : 18 = 0,2
б) |-$1\frac{3}{5}$| $\cdot$ |$3\frac{3}{4}$| = $1\frac{3}{5}$ $\cdot$ $3\frac{3}{4}$ = $\frac{8}{5}$ $\cdot$ $\frac{15}{4}$ = $\frac{8 \cdot 15}{5 \cdot 4}$ = $\frac{2 \cdot 3}{1 \cdot 1}$ = 6
в) |2,4| + |-$2\frac{3}{5}$| = 2,4 + $2\frac{3}{5}$ = 2,4 + 2,6 = 5
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