a) 27.25 + 25.27 - 150

= 27 ( 25+25 ) - 150

= 27.100 - 150

= 2700 - 150 = 2550

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

= 12: { 400 : ( 500 - 300 ) }

= 12 : ( 400 : 200 )

= 12 : 2

= 6

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

= 221 - 16 + 2 - 1

= 206

Chúc  bạn  hok  tốt~

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

bạn bị lỗi rồi

\(12:\left\{400:\left[500-\left(5^3+5^2\cdot7\right)\right]\right\}\)

\(=12:\left\{400:200\right\}\)

=12:2

=6

a) \(28.192+72.192+2022\)

\(=192.\left(28+72\right)+2022\)

\(=192.100+2022\)

\(=19200+2022\)

\(=21222\)

_________

d) \(6:\left\{400:\left[500-\left(125+25.7\right)\right]\right\}\)

\(=6:\left\{400:\left[500-300\right]\right\}\)

\(=6:\left\{400:200\right\}\)

\(=6:2\)

\(=3\)

\(#Wendy.Dang\)

\(c,28\cdot192+72\cdot192+2022\)

\(=192\cdot\left(28+72\right)+2022\)

\(=192\cdot100+2022\)

\(=19200+2022\)

\(=21222\)

\(d,6:\left\{400:\left[500-\left(125+25\cdot7\right)\right]\right\}\)

\(=6:\left\{400:\left[500-\left(125+175\right)\right]\right\}\)

\(=6:\left[400:\left(500-300\right)\right]\)

\(=6:\left(400:200\right)\)

\(=6:2\)

\(=3\)

#Toru

12 : { 400 : [500 – (125 + 25 . 7)]}

12 : { 400 : [500 – (125 + 175]}

12 : { 400 : [500 – 300]}

12 : { 400 : 200}

12 : 2  = 6 

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

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

12 : ( 400 : [ 500 - 300 ]}

12 : ( 400 : 200 )

12 : 2 = 6

6 nha bn

b: \(=72\cdot4-3=288-3=285\)

a, 61.49+27.49+12.49+100.51 = 49.(61+27+12)+100.51 = 49.100+51.100 = 100.(49+51) = 100.100 = 10000

b,  2 3 . 3 3 . 5 + 9 . 6 3 - 8 . 6 3 . 2018 0  (để kết quả dưới dạng lũy thừa)

=  6 3 . 5 + 6 3 . 9 - 8 . 6 3 . 1 =  6 3 . ( 5 + 9 - 8 ) = 6 4

c, 25.5.4.27.2 = (25.4).(5.2).27 = 100.10.27 = 27000

d, 12:{400:[500 – (125+25.7)]} = 12:{400:[500 – 300]} = 12:(400:200) = 12:2 = 6

e,  3 2 . 4 2 . 7 + 12 2 . 6 - 6 2 . 2 2 . 13 + 2020 0

=  12 2 . 7 + 12 2 . 6 - 12 2 . 3 + 1

=  12 2 . 7 + 6 - 13 + 1 = 1

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)

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