72 - (35 +x ) = 27

=> 35 +x = 72 - 27

=> 35 +x = 45

=> x = 45 - 35 

=> x = 10

72-(35+x)=27

     35+x  =72-27

     35+x  =45

           x  =45-35

           x  =10

~~#hân#~~

\(72-\left(35-x\right)=27\)

\(\Rightarrow\left(35-x\right)=72-27\)

\(\Rightarrow\left(35-x\right)=45\)

\(\Rightarrow x=-10\)

\(37\times46+37\times51+111\)

\(=37\times46+37\times51+37\times3\)

\(=37\times\left(46+51+3\right)\)

\(=37\times100\)

\(=3700\)

------------

\(172\times47+86\times8-34\times4\)

\(=172\times47+172\times4-34\times4\)

\(=172\times\left(47+4\right)-34\times4\)

\(=172\times51-34\times4\)

\(=172\times3\times17-17\times2\times4\)

\(=17\times\left(172\times3-2\times4\right)\)

\(=17\times\left(516-8\right)\)

\(=17\times508\)

\(=8636\)

------------

\(35\times215-35\times200-175\)

\(=35\times215-35\times200-35\times5\)

\(=35\times\left(215-200-5\right)\)

\(=35\times10\)

\(=350\)

------------

\(48\times56+28\times104\)

\(=48\times2\times28+28\times104\)

\(=28\times\left(48\times2+104\right)\)

\(=28\times200\)

\(=5600\)

88 800

261 304

không phải nhé

785-954 = ... cảm ơn

e , 12 x 35 + 35 x 182 - 35 x 94 
=    35 x ( 12 + 182 - 94 )
=    35 x       100
=         3500.

n , 19 x 27 + 47 x 81 + 19 x 20
=   19 x 27 + 19 x 20 + 47 x 81 
=   19 x ( 27 + 20 ) + 47 x 81
=   19 x        47      + 47 x 81
=    47 x ( 19 + 81 )
=    47 x     100
=       4700. 
T I C K cho mik nha !
~ HT ~      

a) 23 + 25 + 27 + 29 + 31 + 33 + 35

= 23 + ( 25 + 35 ) + ( 27 + 33 ) + ( 29 + 31 )

= 23 +        60      +      60         +      60

= 23 + 60 x 3

= 23 +    180

= 203

b) 4 . 36 . 25 . 50

=  4 . 4 .9 . 25 . 25 . 2

= 4 . 25 . 4 . 25 . 9 . 2

=   100 . 100     . 9 . 2

= 10 000           . 18

= 180 000

c) 32 . 125 . 3 

= 4 . 8 . 5 . 25 . 3

= 4 . 25 . 8 . 5 . 3

=  100    . 8 . 5 . 3

=      800 . 5 . 3

= 4000 . 3

= 12000

d, 36 . 19 + 36 . 81

= 36 . ( 19 + 81 )

= 36 . 100

= 3600

e, 78 . 31 + 78 . 24 + 78 . 17 + 22 x 72

= 78 . ( 31 + 24  + 17 ) + 22 x 72

= 78 . 72 + 22 . 72

= 72 . ( 78 + 22 )

= 72 . 100

= 7200

A)23+25+27+29+31+33+35

= (33+27)+(25+35)+(29+31)+23

=60+60+60+23

=60x3+23

=180+23

=203

B)4.36.25.50=(36.25).(4.50)

=(4.9.25).(2.2.50)

=(4.25).9 .(2.50).2

=100.9.100.2

=100.(9+2)

=100 .11

=1100

C)32.125.3=(4.8).125.3

=(125.8).(4.3)

=1000.12

=12000

D)36.19.36.81=36.(19+81)

 = 36.100

=3600

E)78.31.+78.24+78.17+22x72=78.31+78.24+78.17+ (16+6).72

=78.31+78.24+78.17+78.16

=78.(31+24+17+16)

=78.88

=6864

\(=\dfrac{35\left(26+72+2\right)}{35\cdot100}=1\)

\(\dfrac{35.26+35.72+70}{35+35+...+35}\)(100 số 35 ở mẫu)

=\(\dfrac{35.26+35.72+35.2}{35.100}\)

=\(\dfrac{35.\left(26+72+2\right)}{35.100}\)

=\(\dfrac{35.100}{35.100}\)

=1

a)=35x(34+38)+72x(65+65)

=35x72+72x130

=72x(35+130)

=72x165

=11880

a, 72 :x = 35 -27

 72 : x =   8

        x =72 : 8

        x = 9

b, x : 8 + 113 =161

     x : 8            = 161 - 113

     x :  8            =    48

      x                 =   48 x 8

      x                 =       304

tik mk nha nguyễn thúy kiều xinh đẹp

Tính nhanh 27 x 35 + 17 x 81 + 27 x 14

 27 x 35 + 17 x 81 + 27 x 14

        = 27 x ( 35 + 14 ) + 17 x 81 

        = 27 x 49 + 17 x 81 

        = 1323 + 1377 

        = 2700

tinh nhanh ma ban