1. 370 600-(15.10 + 15.20) (70–58) · (32 +68) - 90 40. (16+14) -350:50

1. * (600 - (15 \cdot 10 + 15 \cdot 20)) = (600 - (150 + 300)) = (600 - 450) = **150** * ((70 - 58) \cdot (32 + 68) - 90) = (12 \cdot 100 - 90) = (1200 - 90) = **1110** * (40 \cdot (16 + 14) - 350 : 50) = (40 \cdot 30 - 7) = (1200 - 7) = **1193**