6. 200 \(\cdot\) 4 + 200; 900 - 400 : 2; 1000 : 2 + 500; 1000 : 5 - 200; 300 : 300; 300 - 300

Решение:

1. \( 200 \cdot 4 + 200 = 800 + 200 = 1000 \)
2. \( 900 - 400 : 2 = 900 - 200 = 700 \)
3. \( 1000 : 2 + 500 = 500 + 500 = 1000 \)
4. \( 1000 : 5 - 200 = 200 - 200 = 0 \)
5. \( 300 : 300 = 1 \)
6. \( 300 - 300 = 0 \)

Ответ: 1000, 700, 1000, 0, 1, 0.