a) 148 + ( -14 ) + 2012 + ( -134 )
= 148 + [ ( -14 ) + ( - 134 ) ] + 2012
= 148 + ( - 148 ) + 2012
= 0 + 2012
= 2012
b) 102 - ( 4.52 - 3.23 )
= 100 - ( 202 - 69 )
= 100 - ( 400 - 69 )
= 100 - 331
= - 231
c) Vì \(-6< x\le7\)
nên \(x=\left\{-5;-4;-3;-2;-1;0;2;3;4;5;6;7\right\}\)
Học tốt !
Linh Yukiko