\(A=\dfrac{5.\left(2^2.3^2\right)^9.\left(2^2\right)^6-2.\left(2^2.3\right)^{14}.3^4}{5.2^{28}.3^{18}-7.2^{29}.3^{18}}\)

\(=\dfrac{5.2^{18}.3^{18}.2^{12}-2.2^{28}.3^{14}.3^4}{5.2^{28}.3^{18}-7.2^{29}.3^{18}}\)

\(=\dfrac{5.2^{20}.3^{18}-2^{29}.3^{18}}{2^{28}.3^{18}\left(5-7.2\right)}\)

\(=\dfrac{2^{29}.3^{18}\left(5.2-1\right)}{2^{28}.3^{18}\left(5-14\right)}=\dfrac{2.9}{-9}=-2\)

AI LÀM ĐƯỢC TẶNG 2  COIN NÈ MẠI DÔ

khó:)))

= -20/13 nha bạn

\(=\left(-80\right):\left\{51-\left[18-\left(24-5\right)\right]\right\}\)\(=\left(-80\right):\left\{51-\left[18-\left(24-5\right)\right]\right\}\)​​

\(=\left(-80\right):\left\{51-\left[18-19\right]\right\}\)

\(=\left(-80\right):\left\{51-\left(-1\right)\right\}\)

\(=\left(-80\right):52\)

\(=\frac{80}{52}\)

\(=\frac{20}{13}\)

\(----Have.A.Nice.Day.!!!----\)

a) 137

b) 7875

c) 3600

d) 390652

a: =6^2-15*2

=36-30=6

b: =3*25+15*4-3

=72+60

=132

c: =25*2+5

=50+5

=55

d: =5+12=17

e: =7^2(15-5)=49*10=490

f: =4^3*125-125:25

=1000-5

=995

18 : 3 + 182 + 3 ( 51 : 17 )

= 6 + 182 + 3 . 3 

= 188 + 9 

= 197

=))

\(18:3+182+3\left(51:17\right)\)

\(=6+182+3.3\)

\(=6+182+9\)

\(=197\)

Chúc bạn học tốt!

18:3+182+3(51:17)

=6+182+3.3

=6+182+9

=188+9

=197

a) 128 + 43 + 72 + 57

= ( 128 + 72 ) + ( 43 + 57 )

= 200 + 100

= 300

b) 41 . 51 + 49 . 51

= 51 . ( 41 + 49 )

= 51 . 90

= 4590

= 

\(a,\) \(128+43+72+57\)

\(=\left(128+72\right)+\left(43+57\right)\)

\(=200+100\)

\(=300\)

\(b,\) \(41.51+49.51=51.\left(41+49\right)=51.90=4590\)

\(c,\) \(4^7:4^5=4^{7-5}=4^2=16\)

\(d,\) \(2.\left(5.4^2-18\right)\)

\(=2.\left(5.2^4-2.3^2\right)\)

\(=2.2.\left(5.2^3-3^2\right)\)

\(=4.\left(40-9\right)\)

\(=4.31=123\)

a) 12 : { 400 : [ 500 - ( 125 + 25 . 7 )]}

= 12 : { 400 : [ 500 - ( 125 + 175 )]}

= 12 : { 400 : [ 500 - 300 ]}

= 12 : { 400 : 200 }

= 12 : 2 

= 6

b) 5 . 22 - 18 : 3

= 110 - 6

= 104

c) 18 : 3 + 182 + 3 . ( 51 : 17 )

= 6 + 182 + 3.3

= 6 + 182 + 9

= 197

d) 25.8 - 12.5 + 170 : 17 - 8

= 1000 - 60 + 10 - 8

= 940 + 10 - 8

= 940 + 2

= 942

19 h 15 phút

19h 11p

19 giờ 15 phút

Bài 1: Thực hiện các phép tính sau:

\(a)\)Chưa rỏ đề

\(b)\)\(5025\div5-25\div5\)

\(=\)\(1005-5\)

\(=\)\(1000\)

\(c)\)\(218-180\div2\div9\)

\(=\)\(218-10\)

\(=\)\(208\)

\(d)\)\(\left(328-8\right)\div32\)

\(=\)\(320\div32\)

\(=\)\(10\)

Bài 1:

a) ( Tôi không nhìn rõ đầu bài )

b) 5025  :  5  -  25  :  5

=  ( 5025  -  25 )  :  5

=        5000   :   5

=       1000

c)   218  -  180  :  2  :  9

=     218   -    180  :  (  2  .  9 )

=      218    -    180   :  18

=       218    -    10

=       208

d)   (  328  -  8  )  :  32

=      320   :   32

=     10 

Bài 2: Thực hiện phép tính:

\(a)\)\(27.75+25.27-150\)

\(=\)\(27.\left(75+25\right)-150\)

\(=\)\(27.100-150\)

\(=\)\(2700-150\)

\(=\)\(2550\)

\(b)\)\(12\div\left\{400\div\left[500-\left(125+25.7\right)\right]\right\}\)

\(=\)\(12\div\left\{400\div\left[500-\left(125+175\right)\right]\right\}\)

\(=\)\(12\div\left\{400\div\left[500-300\right]\right\}\)

\(=\)\(12\div\left\{400\div200\right\}\)

\(=\)\(12\div2\)

\(=\)\(6\)

\(c)\)\(13.17-256\div16+14\div7-1\)

\(=\)\(221-16+2-1\)

\(=\)\(206\)

\(d)\)\(18\div3+182+3.\left(51\div17\right)\)

\(=\)\(6+182+3.3\)

\(=\)\(6+182+9\)

\(=\)\(197\)