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- (...
Đọc tiếp
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
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
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