Ответ:

  1. \((3.6+4.8)\cdot0.5+2.4:0.6=8.4\cdot0.5+4=4.2+4=8.2\).
  2. \((5\frac{1}{6}+2\frac{5}{6}):\frac{1}{3}-4\frac{1}{2}=8:\frac{1}{3}-4.5=24-4.5=19.5\).
  3. \(15.4:(3.2+4.5)\cdot2-1.8=15.4:7.7\cdot2-1.8=2\cdot2-1.8=2.2\).
  4. \((\frac{2}{3}-\frac{2}{6})\cdot18+3\frac{1}{4}=\frac{1}{3}\cdot18+3.25=6+3.25=9.25\).

Ответ: 1) 8,2; 2) 19,5; 3) 2,2; 4) 9,25.