Question

Select the most reasonable estimated answer.
748.36 – 297.78
a. 300
b. 350
c. 400
d. 450

Answer 1

IF YOU TAKE 748.36 - 297.78 YOUR ANSWER ENDS OF BEING 450.58 SO IN THAT CASE YOUR ANSWER WOULD BE 
D. 450

Answer 2

first number is roughly 750 and second one is roughly 300 so result should be around 450 which is d.