Bài 1:
a.\(12+\left\{45-\left[36:\left(12-9\right)^2\right]\right\}\)
\(=12+\left\{45-\left[36:3^2\right]\right\}\)
\(=12+\left\{45-\left[36:9\right]\right\}\)
\(=12+\left\{45-4\right\}\)
\(=12+41\)
\(=53\)
b.\(24:\left[48-\left(42:7\right)^2\right]\)
\(=24:\left[48-6^2\right]\)
\(=24:\left[48-36\right]\)
\(=24:12=2\)
Bài 2 :
C1 : { 0;1;2;3;4;5;6;7;8;9;10}
C2 : \(\left\{x\in N|x\le10\right\}\)
pha ngoac ra la dc
con bai 2 C1 {1:2:3:4:5:6:7:8:9:0}
C2 {nt huoc N /n<10}
a) 12 + {45 - [36 : (12 - 9)2 ]}
= 12 + [45 - (36 : 32)]
= 12 + [45 - (36 : 9)]
= 12 + (45 - 4)
= 12 + 41
= 53
1/ a) 12 + { 45 - [ 36 : 9 ]}
= 12 + { 45 - 4 }
= 12 + 41
= 53
b) 24 : [ 48 - ( 42 : 7 )2 ]
= 24 : [ 48 - 36 ]
= 24 : 12
= 2
2/
A = { 0;1;2;3;4;5;6;7;8;9;10}
A = { x\(\in\)N / x\(\le\)10 }
Hk tốt