a,27.75+25.27-150

=27.(75+25)-150

=27.100-150

=2700-150

=2550

c,13.17-256:16+14:7-1

=221-16+2-1

=205+2-1

=208-1

=207

d,18:3+182+3.(51:17)

=18:3+182+3.3

=6+182+9

=188+9

=197

e,15-25:8(100.2)

=15-25:8.200

=15-3,125.200

=15-625

=-610

f,25.8-12.5+170:17-8

=200-60+10-8

=140+10-8

=150-8

=142

12:1400.(500-(125+25.70 tôi ko biết làm 

A)23

B)10

C)6

D)169

a)8,75
b)10
c)6
d)169

a) 4.25 - 12.5 + 170 : 10

= 100 - 60 + 17 

= 40 +17

= 57

b) (7 + 3³ : 3²).4 - 3

= (7 + 27 : 9).4 - 3

= (7 + 3).4 - 3

= 10.4 - 3

= 40 - 3

= 37

c) 12 : {400 : [500 - (125 + 25.7)]}

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

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

= 12: {400 : 200}

= 12 : 2 

= 6

d) 168 + {[2. (2⁴ + 3²) - 256⁰] : 7²}

= 168 + {[2. (16 + 9) - 1] : 49}

= 168 + {[2. 25 - 1] : 49}

= 168 + {[50 - 1] : 49}

= 168 + {49 : 49}

= 168 + 1

= 169

TL ;

12:{400:[500-(125+25.7)]}

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

= 12 : { 400 : 200 }

= 12 : 2

= 6

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

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

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

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

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

\(=\)\(6\)

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:

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

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

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

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

\(=\)\(2550\)

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

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

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

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

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

\(=\)\(6\)

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

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

\(=\)\(206\)

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

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

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

\(=\)\(197\)

a) \(27\cdot75+25\cdot27-150\)

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

\(=27\cdot100-150\)

\(=2700-150\)

\(=2550\)

b) \(12:\left\{390:\left|500-\left(125+35\cdot7\right)\right|\right\}\)

\(=12:\left\{390:\left|500-\left(125+245\right)\right|\right\}\)

\(=12:\left\{390:\left|500-370\right|\right\}\)

\(=12:\left\{390:130\right\}\)

\(=12:3\)

\(=3\)

a) 27.(75+25)-150=27.100-150=2550

a,3900.                     b,4

a)

4 . 25 – 12 . 25 + 170 : 10 

= (4 . 25) – (12 . 25) + (170 : 10) 

= 100 - 300 + 17 

= -183

b)

(7 + 33 + 32) . 4 – 3 

= (7 + 27 + 9) .4 – 3

= 43 . 4 – 3

= (43 . 4) – 3

= 45

c)

12 : {400 : [500 – (125 + 25 . 7)}

= 12 : {400 : [500 – (125 + 175)}

= 12 : (400: 200)

= 12 : 2

= 6

d)

168 + {[2.(2⁴ + 3²) - 256⁰] : 72}.

= 168 + [2 . (16 + 9) – 1] : 49

= 168 + 49: 49

= 168 + 1 

= 167

a) 

4 . 25 – 12 . 25 + 170 : 10 

= (4 . 25) – (12 . 25) + (170 : 10) 

= 100 - 300 + 17 

= -183

b)

(7 + 33 + 32) . 4 – 3 

= (7 + 27 + 9) .4 – 3

= 43 . 4 – 3

= (43 . 4) – 3

= 45

c)

12 : {400 : [500 – (125 + 25 . 7)}

= 12 : {400 : [500 – (125 + 175)}

= 12 : (400: 200)

= 12 : 2

= 6

d)

168 + {[2.(2⁴ + 3²) - 256⁰] : 72}.

= 168 + [2 . (16 + 9) – 1] : 49

= 168 + 49: 49

= 168 + 1 

= 167

a)

4.25 -12.5 + 170 : 10=100−60+17=40+17=57.​

b)

 (3:3((7+33:32).4−3=(7+3).4−3=40−3=37.

c)

 {[({[(

a 27 . 75 + 25 . 27 - 150

= 27 . ( 75 + 25 ) - 150

= 27 . 100 - 150

= 2700 - 150

2550

b ) 12 : { 390 :  [ 500 - ( 125 + 35 . 7 ) ] }

= 12 : { 390 : [ 500 - ( 125 + 245 ) ] }

= 12 : { 390 : [ 500 - 370 ] }

= 12 : { 390 : 130 }

= 12 : 3

= 4

a) 2550 

b) 4

a 27 . 75 + 25 . 27 - 150

= 27 . ( 75 + 25 ) - 150

= 27 . 100 - 150

= 2700 - 150

2550

b ) 12 : { 390 :  [ 500 - ( 125 + 35 . 7 ) ] }

= 12 : { 390 : [ 500 - ( 125 + 245 ) ] }

= 12 : { 390 : [ 500 - 370 ] }

= 12 : { 390 : 130 }

= 12 : 3

= 4

a) 27.75+26.27-150=27(75+25)-150

                           = 2700-150

                            = 2550

b) = 12: {390:[500-370]

= 12:{390:130}

=12:3

=4

a)2550                                                                                                                                         b)4     

Cậu vào câu hỏi tương tự ấy

a) 27.75 + 25.27 - 150

= 27.(75 + 25) - 150

= 27.100 - 150

= 2700 - 150

= 2550

b) 12:{390:[500 - (125 + 35.7)]}

= 12:{390:[500 - (125 + 245)]}

= 12:{390:[500 - 370]}

= 12:{390 : 130}

= 12 : 3

= 4