A) 5.(-8)+(-2).(-3)-17+12
B) 2.(4^2-3^3):11
C) / 4^3-(-2^3)/ :(-3)^2
D) 12 +(-15)-(10-18)
* Lưu ý : dấu gạch chéo là dấu ngoặc vuông
A) 5.(-8)+(-2).(-3)-17+12
B) 2.(4^2-3^3):11
C) / 4^3-(-2^3)/ :(-3)^2
D) 12 +(-15)-(10-18)
* Lưu ý : dấu gạch chéo là dấu ngoặc vuông
$a, 5 . ( -8 ) + ( -2 ) . ( -3 ) – 17 + 12$
$= ( -40 ) + 6 – 17 + 12$
$= – ( 40 + 17 ) + ( 6 + 12 )$
$= – 57 + 18$
$= – ( 57 – 18 )$
$= -39$
$b, 2 . ($ `4^2` – `3^3` ) $: 11$
$= 2 . ( 16 – 27 ) : 11$
$= 2 . ( -11 ) : 11$
$= ( -22 ) : 11$
$= -2$
$c,$ [ `4^3` – ( `-2^3` )] : `(-3)^2`
$= [ 64 – ( -8 )] : 9$
$= ( 64 + 8 ) : 9$
$= 72 : 9$
$= 8$
$d, 12 + ( -15 ) – ( 10 – 18 )$
$= 12 – 15 – ( 10 – 18 )$
$= – 3 – ( -8 )$
$= – 3 + 8$
$= 8 – 3$
$= 5$
a) 5.(-8)+(-2).(-3)-17+12
= -40 + 6 -17 + 12
= – 34 -17+12
= -51 +12
= -39
b) 2. ($4^{2}$ – $3^{3}$ ):11
= 2. (16-27) :11
= 2. (-11) :11
= -22 :11
= -2
c) [$4^{3}$ – (-$2^{3}$ )]:$(-3)^{2}$
= [64 – (-8)] : 9
= (64+8) : 9
= 72 : 9
= 8
d) 12 +(-15)-(10-18)
= 12 -15-(-8)
= -3 +8
= 5
CHÚC BẠN HỌC TỐT!