a) \(204-84:12=204-7=197\)

b) \(15.2^3+4.3^2-5.7=15.8+4.9+5.7=120+36+35=156+35=191\)

c) \(5^6:5^3+2^3.2^2=5^3+2^5=125+32=157\)

d) \(164.53+47.164=164.\left(53+47\right)=164.100=16400\)

_Chúc bạn học tốt_

a)

204 - 84:12 = 204 - 7 = 197

b)

15.2³ + 4.3² - 5.7 = 15.8 + 4.9 – 5.7 = 120 + 36 - 35 = 121

c) Áp dụng:

a^m . aⁿ = a^m+n

a^m : aⁿ = a^m-n

5⁶:5³ + 2³.2² = 5³ + 2⁵ = 125 + 32 = 157

d)

164.53 + 47.164 = 164(53 + 47) = 164.100 = 16400

a) 204 - 84 : 12

= 204 - 7 = 197

b) 15.2³ + 4.3² - 5.7

= 15.8 + 4.9 - 35

= 120 + 36 - 35

= 156 - 35

= 121

c) 5⁶ : 5³ + 2³.2²

= 5^{6 - 3} + 2^{3 + 2}

= 5³ + 2⁵

= 125 + 32

= 157

d) 164.53 + 47.164

= 164.( 53 + 47 )

= 164.100

= 16400

a)

204-84:12

=204-7

=197

b)

15.2³+4.3²-5.7

=15.8+4.9-5.7

=120+36-35

=156-35

=121

c)

5⁶:5³+2³.2²

=5^6-3+2³⁺²

=5³+2⁵

=125+32

=157

d)

164.53+47.164

=(164.(53+47)

=164.100

=16400

tìm x:

219-7(x+1)=100

=>7(x+1)=219-100

=>7(x+1)=119

=>x+1=119:7

=>x+1=17

=>x=17-1

=>x=16

(3x-6).3=3⁴

=>(3x-6).3=81

=>3x-6=81:3

=>3x-6=27

=>3x=27+6

=>3x=33

=>x=33:3

=>x=11

nhác động não bài dễ thế này ko chịu suy nghĩ cứ ỷ lại olm

208 - 84: 12= 208- 7= 201

5^6 : 5^3 + 2^3.2^2= 5^3 + 2^5= 125 + 32= 1577

15 . 2^3 + 4 . 3^2 - 5.7= 15 . 8 + 4. 9 - 5.7= 120 + 36 - 35=156 - 35=121

164 . 53 + 47 . 164= 164.(53 + 47)=164. 100=16400

a)204-84:12=204-7=197

b)5⁶:5³+2³.2²=(5:5)⁹+2⁵=9+32=41       

c)15.2³+4.3²-5.7=15.8+4.9-35=120+36-35=121

d)164.53+47.164=(53+47).164=100.164=16400

a) 204 - 84 : 12

= 204 - 7

= 197

b) 15 . 2³ + 4 . 3² - 5 . 7

= 15 . 8 + 4 . 9 - 35

= 121.

c) 5⁶ : 5⁵ + 2³ . 2²

= 5 + 2⁵

= 37.

d) 164 . 53 + 47 . 164

= 164. (53 + 47)

= 164 . 100

= 16400.

a)

204 - 84 : 12

= 204 - ( 84 : 12 )

= 204 - 7

= 107

b)

15 . 2³ + 4 . 3² - 5 . 7

= 15 . 8 + 4 . 9 - 5 . 7 

= 120 + 36 - 35

= 156 - 35

= 121

c)

5⁶ : 5³ + 2³ . 2² 

= 5^(6-3) + 2⁽³⁺²⁾

= 5³ + 2⁵

= 125 + 32

= 157

d) 164 . 53 + 47 . 164

= 164 . ( 53 + 47 )

= 164 . 100

= 16400

a,198

b,51

c,157

d,1640

12.53+53.172 - 53.84

= 53.(12+172 - 84)

= 53.100

= 5300

\(12.53+53.172-53.84\)

\(=53.\left(12+172\right)-53.84=53.184-53.84\)

\(=53.\left(184-84\right)=53.100=53.10^2\)

\(=53.10.10=530.10\)

\(=5300\)

a=197

b=157

c=121

d=16400

a)197

b)157

c)121

d)16400

   12x53x172-53x84

=53x12(172+7+1)

=100x53x12

=63600

đáp số:36 600