75 . 101 - 75 + 25 . 99 + 2
= 75 ( 101 - 1 ) + 25 . 99 + 2
= 75 . 100 + 25 . 99 + 2
= 75 . 4 . 25 + 25 . 99 + 2
= 300 . 25 + 25 . 99 + 2
= 25 ( 300 + 99 ) + 2
= 25 . 399 + 2
= 9977
75.101-75+25.99+2=
=75.(101-1)+2475+2
=7500+2477
=9977
tick cho mịnh nha