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 120+36 -35=121

B 16400

C 157

k nha

BẠN ƠI BẠN CÓ THỂ GIÚP MÌNH LÀM CỤ THỂ RA ĐƯỢC KO

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

a=197

b=157

c=121

d=16400

a)197

b)157

c)121

d)16400

= \(\dfrac{1}{3}\times\left(164+136+300\right)\)
= \(\dfrac{1}{3}\times600\)
= 200

\(\Leftrightarrow164-4\left(x-5\right)=80\\ \Leftrightarrow4\left(x-5\right)=84\\ \Leftrightarrow x-5=21\Leftrightarrow x=26\)

\(3\left(2x+1\right)=179-164=15\)

\(2x+1=\dfrac{15}{3}=5\)

\(2x=5-1=4\\ x=\dfrac{4}{2}=2\)

\(179-3\left(2x+1\right)=164.\)

\(\Leftrightarrow3\left(2x+1\right)=15.\Leftrightarrow2x+1=5.\Leftrightarrow x=2.\)