1. (400 - 13 · 20) : 10
\( (400 - 13 \times 20) \div 10 = (400 - 260) \div 10 = 140 \div 10 = 14 \)
2. 3000 · 1 - 3000 : 100
\( 3000 \times 1 - 3000 \div 100 = 3000 - 30 = 2970 \)
Ответ: 14, 2970.