Question

[Chu Nguyễn Bảo Trang]

a. 17,85 + 15,17- 120

c.  3 mũ 3 . 22 - 27 .19

b. 5. 7 mũ 2 - 24 : 2 mũ 3

d. - [ - 13] + [ -23] 

e. - [- 13] + [-25] +12

f. 23 - [ 12 - 4 mũ 2 ] +15

g. 80 - [ 130 - [ 12- 4] ^2]

h. 2^4 .5 -[ 131 - (13 -2 ^2 )^2 ]

i. - [ -23] - [-13] -4 ^2 

k. ( 3^15 .4 + 5.3^15 ) : 3^16 

l. 1125 : 3^2 + 4^3 .125 -125 : 5^2 

m. 375 + [ 58 + ( -375 ) + (38) ]

n. -18 : ( -6)- (-12) + (-20)

p. 2011- { 5. 5^2 - [ ( 7^3 :7 +2012 ^0 ] } 

p.1449 - {[( 216 +184) : 8 ] .9}

r. 120 : { 520 : [ 500- ( 5^3+ 35 .7 )]}

s .1500- { 5^3 .2^3 -11 . [ 7^2 - 5. 2^3 + 8 (11^2 -121)]}

giúp mình vs mình đang cần gấp ạ . ! 

mình cảm ơn 

Answer 1

[Nguyễn Lê Phước Thịnh]

a: \(17\cdot85+15\cdot17-120\)

\(=17\left(85+15\right)-120\)

\(=17\cdot100-120=1700-120=1580\)

c: \(3^3\cdot22-27\cdot19\)

\(=27\cdot22-27\cdot19\)

\(=27\left(22-19\right)=27\cdot3=81\)

b: \(5\cdot7^2-24:2^3\)

\(=5\cdot49-24:8\)

=245-3=242

d: -(-13)+(-23)

=13-23

=-10

e: -[-13]+[-25]+12

=13-25+12

=25-25=0

f: \(23-\left(12-4^2\right)+15\)

\(=23-\left(12-16\right)+15\)

=38-(-4)=38+4=42

g: \(80-\left[130-\left(12-4\right)^2\right]\)

\(=80-130+8^2\)

=64-50=14

h: \(2^4\cdot5-\left[131-\left(13-2^2\right)^2\right]\)

\(=16\cdot5-\left[131-\left(13-4\right)^2\right]\)

=80-131+81

=161-131=30

i: \(-\left(-23\right)-\left(-13\right)-4^2\)

=23+13-16

=36-16=20

k: \(\dfrac{\left(3^{15}\cdot4+3^{15}\cdot5\right)}{3^{16}}=\dfrac{3^{15}\cdot\left(5+4\right)}{3^{16}}=\dfrac{9}{3}=3\)

l: \(1125:3^2+4^3\cdot125-125:5^2\)

=1125:9+8*125-125:25

=125+1000-5

=1120

m: \(375+\left[58+\left(-375\right)+38\right]\)

=375+58-375+38

=58+38=96

n: -18:(-6)-(-12)+(-20)

=3+12-20

=15-20=-5

p: \(2011-\left\{5\cdot5^2-\left[7^3:7+2012^0\right]\right\}\)

\(=2011-\left\{125-7^2-1\right\}\)

=2011-125+49+1

=1936

p.1449 - {[( 216 +184) : 8 ] .9}

\(=1449-\left\{400:8\cdot9\right\}\)

=1449-450

=999

r. 120 : { 520 : [ 500- ( 5^3+ 35 .7 )]}

\(=120:\left\{520:\left[500-\left(125+245\right)\right]\right\}\)

\(=120:\left\{520:\left[500-370\right]\right\}\)

=120:(520:130)

=120:4=30

s .1500- { 5^3 .2^3 -11 . [ 7^2 - 5. 2^3 + 8 (11^2 -121)]}

\(=1500-\left\{10^3-11\cdot\left[49-5\cdot8+8\cdot0\right]\right\}\)

\(=1500-1000+11\cdot\left(49-40\right)\)

=500+11*9

=500+99

=599

Answer 2

[Nguyễn Thị Thương Hoài]

a; 17,85 + 15,17 - 120

= 33,02 - 120

= 86,98

c; 3³.22 - 27.19

= 27.22 - 27.19

= 27.(22 - 19)

= 27.3

= 81

b; 5.7² - 24 : 2³

= 5.49 - 24: 8

= 245 - 3

= 242 

d; - (- 13) + (- 23)

= 13 - 23

= - 10