200 ⋅ 4 + 200 = 800 + 200 = 1000
900 − 400 : 2 = 900 − 200 = 700
1 000 : 2 + 500 = 500 + 500 = 1000
1 000 : 5 − 200 = 200 − 200 = 0
Ответ: 200 ⋅ 4 + 200 = 1000, 900 − 400 : 2 = 700, 1 000 : 2 + 500 = 1000, 1 000 : 5 − 200 = 0