Bấm vào chữ "Đúng 0" là hiện ra câu trả lời của mik ák

a, x + 32...  .<......41+  x
b,56- y .. >  ..... 45-y
c, x-26 ..<.  ......x-18
d,42 + 21 + x...> .... 42+ 21
g, 52- 47..> ..... 52-47-x
h, 29+ 42- x..<. 42+29+ x

Học tốt!!!

#Bo

Giải

a, x + 32         <  41+  x
b,56- y            >  45-y
c, x-26            <  x-18
d,42 + 21 + x  >  42+ 21
g, 52- 47        >   52-47-x
h, 29+ 42- x   <  42+29+ x

-Chúc họk tốt-

Q

                                             Bài giải

a, \(81+243+19=\left(81+19\right)+243=100+243=343\)

b, \(2\text{ x }25\text{ x }2\text{ x }16\text{ x }4=25\text{ x }4\text{ x }2\text{ x }2\text{ x }16=25\text{ x }8\text{ x }32=200\text{ x }32=6400\)

c, \(32\text{ x }47+32\text{ x }54-32=32\text{ x }\left(47+54-1\right)=32\text{ x }100=3200\)

a,81+19+243

=100+243

b,(2x25)x2x(16x4)

=50x2x64

=100x64

=6400

c,32x47+32x54-32x1

=32x(47+54-1)

=32x100

=3200

a,\(81+243+19=\left(81+19\right)+243\)

                                \(=100+243=343\)

b,\(2\times25\times2\times16\times4=\left(25\times4\right)\times\left(2\times2\times16\right)\)

                                          \(=100\times64=6400\)

c,\(32\times47+32\times54-32=32\times47+32\times54-32\)

                                                  \(=\left(47+54-1\right)\times32\)

                                                  \(=3200\)

31x72 - 31x70 - 31 x 2 - 31

=31x(72 -70 -2 -1)

=31 x (-1)

= -31

những câu sau thì lam tương tự nha bạn ^_^

\(32\times47+32\times53\)

\(=32\times\left(47+53\right)\)

\(=32\times100\)

\(=3200\)

32 x 47 + 32 x 53

= 32 x ( 47 + 53 )

= 32 x 100

= 3200

32 x 47 + 32 x 53

= 32 x ( 47 + 53 )

= 32 x 100

= 3200

\(x-\left\{57-\left[42+\left(-23-x\right)\right]\right\}=13-\left\{47+\left[25-\left(32-x\right)\right]\right\}\)

=>\(x-\left\{57-42+23+x\right\}=13-47-25+32-x\)

=>\(x-\left(x+38\right)=-27-x\)

=>\(-27-x=-38\)

=>x+27=38

=>\(x=38-27=11\)

\(\left(x+32\right)-17=52:4\)

\(\left(x+32\right)-17=13\)

\(\left(x+32\right)=13+17\)

\(x+32=30\)

\(x=30-32\)

\(x=-2\)

Vậy x=\(-2\)

(χ+32)-17 =52:4

(x+32)-17=13

(x+32)=13+17

x+32=30

x=30-32

x=−2

Vậy x=$-2$

a) 81 + 243 + 19 = (81 + 19) + 243 

                         = 100 + 143 = 243

b) 168  + 79 + 132 = (168 + 132) + 79 

                            = 300 + 79 = 379

c) 5 x 25 x 2 x 16 x 4 = (5 x 2) x (25 x 4) x 16 

                               = 10 x 100 x 16 = 16000

d) 32 x 47 + 32 x 53 = 32 x (47 + 53) 

                              = 32 x 100 = 3200

e) 26 + 27 + 28 + 29 + 30 + 31 + 32 = (26 + 32) + (27 + 31) + (28 + 30) + 29 

                                                     = 58 + 58 + 58 + 29 

                                                      = 58 x 3 + 29 = 174 + 29 = 203

a) 81 + 243 + 19

  = 81 + 19 + 243

 = 100 + 243

= 343

b) 168 + 79 + 132

  = ( 168 + 132 ) + 79

  = 300 + 79

  = 379

\(x-\left\{57-\left[42+\left(-23-x\right)\right]\right\}=13-\left\{47+\left[25-\left(32-x\right)\right]\right\}\)

\(\Leftrightarrow x-57+42-23-x=13-47-25+32-x\)

\(\Leftrightarrow x-x-57+42-23=-27-x\)

\(\Leftrightarrow-57+42-23=-27-x\)

\(\Leftrightarrow-38=-27-x\)

\(\Leftrightarrow x=\left(-27\right)-\left(-38\right)\)

\(\Leftrightarrow x=11\)

Vậy \(x=11\) là giá trị cần tìm

\(x-\left(57-\left(42+\left(-23-x\right)\right)\right)=13-\left(47+\left(25-\left(32-x\right)\right)\right)\)

\(\Leftrightarrow\) \(x-\left(57-\left(42-23-x\right)\right)=13-\left(47+\left(25-32+x\right)\right)\)

\(\Leftrightarrow\) \(x-\left(57-42+23+x\right)=13-\left(47+25-32+x\right)\)

\(\Leftrightarrow\) \(x-57+42-23-x=13-47-25+32-x\)

\(\Leftrightarrow\) \(-38=-27-x\) \(\Leftrightarrow\) \(-x=-38+27=-11\Leftrightarrow x=11\)

vậy \(x=11\)

\(x-\left\{57-\left[42+\left(-23-x\right)\right]\right\}=13-\left\{47+\left[25-\left(32-x\right)\right]\right\}\)

\(\Leftrightarrow x-57+42-23-x=13-47-25+32-x\)

\(\Leftrightarrow x-x-57+42-23=-27-x\)

\(\Leftrightarrow-57+42-23=-27-x\)

\(\Leftrightarrow-38=-27-x\)

\(\Leftrightarrow x=-27-\left(-38\right)\)

\(\Leftrightarrow x=11\left(TM\right)\)

Vậy \(x=11\) là giá trị cần tìm

\(\Leftrightarrow\) \(x-\left(57-\left(42-23-x\right)\right)=13-\left(47+\left(25-32+x\right)\right)\)

\(\Leftrightarrow\) \(x-\left(57-42+23+x\right)=13-\left(47+25-32+x\right)\)

\(\Leftrightarrow\) \(x-57+42-23-x=13-47-25+32-x\)

\(\Leftrightarrow\) \(-38=-27-x\) \(\Leftrightarrow\) \(-x=-38+27=-11\Leftrightarrow x=11\)

vậy \(x=11\)