1) 

3³ . 18 + 72 . 4² - 41 . 18

= 3³ . 18 + 18 . 4³ - 41 . 18

= 18 . ( 3³ + 4³ - 41 )

= 18 . 50

= 900

2) ( 56 . 46 - 25 . 23 ) : 23

= ( 112 . 23 - 25 . 23 ) : 23

= ( 112 - 25 ) . 23 : 23

= 87 . 23 : 23

= 87

3) ( 76 . 34 - 19 . 64 ) : ( 38 . 9 )

= ( 19 . 136 - 19 . 64 ) : ( 19 . 18 )

= 19 . ( 136 - 64 ) : ( 19 . 18 )

= 19 . 72 : 19 . 18

= 19 . 4

= 76

4) ( 5 . 4¹¹ - 3 . 16⁵ ) : 4¹⁰

= ( 5 . 4¹¹ - 3 . 4¹⁰ ) : 4¹⁰

= ( 20 . 4¹⁰ - 3 . 4¹⁰ ) : 4¹⁰

= ( 20 - 3 ) . 4¹⁰ : 4¹⁰

= 17

Bai nay minh lam roi bang 17 do

a: \(=347\cdot4\cdot9\cdot400:8=347\cdot36\cdot50=624600\)

c: \(=16:\left\{400:\left[200-37-138\right]\right\}\)

\(=16:\left\{400:25\right\}=16:16=1\)

e: \(=46-\left[300:15\right]-2=46-20-2=24\)

3^3.18+72.4^2-41.18=27.18+18.64-41.18=18(27+64-41)=18.50=900

(56.46-25.23);23=(112.23-25.23):23=87.23:23=87

(28.54+56.36):21:2=(28.54+28.72):21:2=28.126:21:2=(28:2).(126:21)=14.6=84

(2+4+6+....+100)(36.333-108.111)=(2+4+6+100)(108.111-108.111)=0

(5.4^11-3.16^5):4^10=(5.4^11-3.4^10):4^10=5.4-3=17

\(\left(2^{17}+7^2\right).\left(9^{15}-3^{15}\right).\left(2^4-4^2\right)\)

\(=\left(2^{17}+7^2\right).\left(9^{15}-3^{15}\right).\left(16-16\right)\)

\(=\left(2^{17}+7^2\right).\left(9^{15}-3^{15}\right).0\)

\(=0\)

-------------------------------------------------

\(\left(7^{1997}-7^{1995}\right):\left(7^{1994}.7\right)\)

\(=\left[7^{1995}\left(7^2-1\right)\right]:7^{1995}\)

\(=7^{1995}.48:7^{1995}\)

\(=48\)

-------------------------------------------------

\(\left(1^2+2^3+3^4+4^5\right).\left(1^3+2^3+3^3+4^3\right).\left(3^8-81^2\right)\)

\(=\left(1^2+2^3+3^4+4^5\right).\left(1^3+2^3+3^3+4^3\right).\left(6561-6561\right)\)

\(=\left(1^2+2^3+3^4+4^5\right).\left(1^3+2^3+3^3+4^3\right).0\)

\(=0\)

-------------------------------------------------

\(\left(2^8+8^3\right):\left(2^5.2^3\right)\)

\(=\left[2^8+\left(2^3\right)^3\right]:2^8\)

\(=\left(2^8+2^9\right):2^8\)

\(=2^8.\left(1+2\right):2^8\)

\(=2^8.3:2^8\)

\(=3\)

sos

\((2^{17}+17^{2}).(9^{15}-3^{15}).(2^{4}-4^{2})\)

\(=(2^{17}+17^{2}).(9^{15}-3^{15}).(16-16)\)

\(=(2^{17}+17^{2}).(9^{15}-3^{15}).0\)

\(=0\)

\((7^{1997}-7^{1995}):(7^{1994}.7)\)

\(=(7^{1997}-7^{1995}):7^{1995}\)

\(=7^{1997}:7^{1995}-7^{1995}:7^{1995}\)

\(=7^{2}-1=49-1=48\)

\(1^{2}+2^{3}+3^{4}+4^{5}).(1^{3}+2^{3}+3^{3}+4^{3}).(3^{8}-81^{2})\)

\(=(1^{2}+2^{3}+3^{4}+4^{5}).(1^{3}+2^{3}+3^{3}+4^{3}).(6561-6561)\)

\(=(1^{2}+2^{3}+3^{4}+4^{5}).(1^{3}+2^{3}+3^{3}+4^{3}).0\)

\(=0\)

\((2^{8}+8^{3}):(2^{5}.2^{3})\)

\(=[2^{8}+(2^{3})^{3}]:2^{8}\)

\(=(2^{8}+2^{9}):2^{8}\)

\(=2^{8}:2^{8}+2^{9}:2^{8}\)

\(=1+2=3\)

a: Ta có: \(\left(2^{17}+17^2\right)\cdot\left(9^{15}-3^{15}\right)\cdot\left(2^4-4^2\right)\)

\(=\left(2^{17}+17^2\right)\cdot\left(9^{15}-3^{15}\right)\cdot\left(16-16\right)\)

=0

b: Ta có: \(\dfrac{8^{2017}-8^{2015}}{8^{2104}\cdot8}\)

\(=\dfrac{8^{2015}\cdot\left(8^2-1\right)}{8^{2105}}\)

\(=\dfrac{1\cdot63}{8^{90}}\)+

c: Ta có: \(\left(1^3+2^3+3^4+4^5\right)\cdot\left(1^3+2^3+3^3+4^3\right)\cdot\left(3^8-81^2\right)\)

\(=\left(1^3+2^3+3^4+4^5\right)\cdot\left(1^3+2^3+3^3+4^3\right)\cdot\left(3^8-3^8\right)\)

=0

d: Ta có: \(\left(2^8+8^3\right):\left(2^5\cdot2^3\right)\)

\(=\dfrac{2^8+2^9}{2^8}\)

=3

a) 80 - (4.5² - 3.2³)

= 80 - 100 + 24

= 4

b) 23.75 + 25.23 + 180

= 25.(23.3 + 23) + 180

= 25.23.4 + 180

= 100.23 + 180

= 2300 + 180

= 2480

c) 2448 : [119 - (23 - 6)]

= 2448 : (119 - 17)

= 2448 : 102

= 24

a,80 - (100-24)

= 80-76

= 4

b,1725+575+180

=2300+180

=2480

c,2448 : [119-17]

=2448 : 102

= 24

mik mong bn sẽ làm đúng

a, = 80-(4.25-3.8)

= 80 - ( 100 - 24 )

= 80 - 76 

= 4 

b , 23,75+25,23+180 =  48.98 + 180 = 228.98

c , 2448 : [119 - ( 23 - 6 ) = 2448 : [ 119 - 17 ]

= 2448 : 7 

= 394.7142857

a, = 80-(4.25-3.8)

= 80 - ( 100 - 24 )

= 80 - 76 

= 4 

b , 23,75+25,23+180 

=  48.98 + 180 = 228.98

c , 2448 : [119 - ( 23 - 6 ) = 2448 : [ 119 - 17 ]

= 2448:7 

= 394.7142857

tick nhé bạn

a, = 80-(4.25-3.8)

= 80 - ( 100 - 24 )

= 80 - 76 

= 4 

b , 23,75+25,23+180 =  48.98 + 180 = 228.98

c , 2448 : [119 - ( 23 - 6 ) = 2448 : [ 119 - 17 ]

= 2448 : 7 

= 394.7142857