Задание 2. 1. (8,4 − 2,9) · 2 + 3,6 · 0,9; 2. (4 3/4 − 1 12/16) · 2/5 + 2/10; 3. 24 : (5,6 − 2,4) + 3,5 · 0,4; 4. (6/8 − 2/4) : 1/2 + 2 1/4.

1. \((8.4-2.9)\cdot2+3.6\cdot0.9=5.5\cdot2+3.24=11+3.24=14.24\).
2. \((4\frac{3}{4}-1\frac{12}{16})\cdot\frac{2}{5}+\frac{2}{10}=(4.75-1.75)\cdot0.4+0.2=3\cdot0.4+0.2=1.4\).
3. \(24:(5.6-2.4)+3.5\cdot0.4=24:3.2+1.4=7.5+1.4=8.9\).
4. \((\frac{6}{8}-\frac{2}{4}):\frac{1}{2}+2\frac{1}{4}=(0.75-0.5):0.5+2.25=0.25:0.5+2.25=2.75\).

Ответ: 1) 14,24; 2) 1,4; 3) 8,9; 4) 2,75.