My younger brother needs help with this and I don't have any more brain cells left please just answer this,

Answer:
column 1 = 320; column 2 = 600; column 3 = 629
Step-by-step explanation:
Answer:
320; 600; 629
Step-by-step explanation:
617-296
is approx. 620-300 = 320
1894-1265
to nearest hundred: 1900-1300 = 600
actual difference: 629