Question

tính nhanh : 815-23-77+185

Answer 1

815 - 23 - 77 + 185 

= (815 + 185) - (23 + 77)

= 1000 - 100

= 900

Answer 2

815-23-77+185

=(815+185)-(23+77)

=1000-100=900

Answer 3

\(\left(815+185\right)-\left(23+77\right)\)

\(=1000-100\)

\(=900\)

Answer 4

815 - 23 - 77 + 185 

= (815 + 185) - (23 + 77)

= 1000 - 100

= 900

 

Answer 5

815 - 23 - 77 + 185 

= (815 + 185) - (23 + 77)

= 1000 - 100

= 900