= 16 - 9 ( 34 - 55-3 )
= 16 - 9 ( 34 - 52 )
= 16 - 9 ( 34 - 25 )
= 16 - 9 . 9
= 16 - 81
= + ( 81 - 16 )
= + 55
42 - 9 ( 34 - 55 : 53)
\(\Rightarrow\)42 - 9 ( 34 - 52)
\(\Rightarrow\)42 - 9 . 9
\(\Rightarrow\)42 - 81
\(\Rightarrow\)- 65
Chúc bạn học tốt ^^!
4^2 - 9 (34 - 5^5 : 5^3) .
= 16 - 9 (34 - 5^2) .
= 16 - 9 (34 - 25) .
= 16 - 9 * 9 .
= 16 - 81 .
= -65 .