https://i.imgur.com/Ov9xL45.jpg
4 . 52+ 81 : 32 - ( 13 - 4 )2
= 4 . 25 + 81 : 9 - 9\(^2\)
= 100 + 9 - 81
= 28
4.5\(^2\) +81:3\(^2\) -(13-4)\(^2\)
=4.25+81:9-9\(^2\)
=100+9-81
=28
4 . 52+ 81 : 32 - ( 13 - 4 )2
= 4 . 25 + 81 : 9 - 92
= 100 + 9 - 81
= 28
4 . 52 +81 : 32 - (13 - 4)2
= 4 . 25+ 81 : 9 - 92
= 100 + 9 - 81
= 28
Chúc bạn học tốt!
