Частина 2. Номер 183

600 : 200 + 900 : 300 = 3 + 3 = 6;

80 : 20 – 60 : 30 = 4 – 2 = 2;

170 + 390 = 560;

640 – 360 = 280;

200 · 4 – 0 : 500 = 800 – 0 = 800;

300 · 2 + 0 · 800 = 600 + 0 = 600.