\(174\) x \(1274-175\) x \(273-175\)

\(=221676-47775-175\)

\(=173726\)

\(174x1274-175x273-175\)

\(=221676-47775-175\)

\(=173726\)

173726 nhé bạn ê

biến đổi được : \(\frac{\left(x-1\right)\left(x-1\right)-\left(x+1\right)\left(x+1\right)+4}{\left(x-1\right)\left(x+1\right)}=\frac{x^2-2x+1-x^2-2x-1+4}{\left(x-1\right)\left(x+1\right)}\)

=\(\frac{-4x+4}{\left(x-1\right)\left(x+1\right)}=\frac{-4\left(x-1\right)}{\left(x-1\right)\left(x+1\right)}=-\frac{4}{x+1}\)

Lời giải:
1. Bạn coi lại đề

2. $=234\times (1257-257)=234\times 1000=234000$

3. $=175\times (1274-273-1)=175\times 1000=175000$

4. $=(4\times 25)\times (125\times 8)=100\times 1000=100000$

1. ...............................

2. $=234\times (1257-257)=234\times 1000=234000$

3. $=175\times (1274-273-1)=175\times 1000=175000$

4. $=(4\times 25)\times (125\times 8)=100\times 1000=100000$

175 . 1274 - 175 . 273 - 175

= 175 . 1274 - 175 . 273 - 175 . 1

= 175( 1274 - 273 - 1 )

= 175 . 1000 

= 175 000

175.1274-175.273-175

175.(1274-273-1)

175.1000

175000

175000

175 x 1274 - 273 x 7 x 25 - 100 -75

=175 x 1274 - 273 x (7 x 25) - 100 -75

= 175 x 1274 - 273 x 175 - 100 -75

= 175 x (1274 - 273) - 100 - 75

= 175 x 1001 - 100 - 75

= 175175 -100 - 75

= 175000

175*1274-273*7*25-100-75

=175*1274-273*175-175

=175*(1274-273-1)

=175*1000

=175000

       \(175.1274-273.7.25-100-75\)

\(=175.1274-273.\left(7.25\right)-100-75\)

\(=175.1274-273.175-25\)

\(=175.\left(1274-273\right)-25\)

\(=175.1001-25\)

\(=175175-25\)

\(=175150\)

a)=234(1257-257)

=234.1000

=234000

b)=524(1327-327)

=524.1000

=524000

c)=325(1574-325-24)

=325.1225

=398125

d)=175(1274-273-1)

=175.1000

=175000

234x (1257-257)= 234 x 1000 = 234000

1327 x 524 - 524 x 327 = 524 x (1327 - 327 ) = 524 x 1000 = 524000

325x1574 - 325 x 325 -325 x24 =325 x(1574 - 325 - 24 )= 325 x 1225 =398125

175 x 1274 - 175 x273 -175 = 175 x (1274 - 273 -1) = 175 x 1000= 175000

                 kkk mk nha bạn !!!!!!!!

a)234 x 1257 - 234 x257

= 234 x (1257 - 257)

= 234 x 1000

= 234000

b)1327 x 524 - 524  x327

= 524 x (1327 - 327)

=524 x 1000

=524000

c)325 x 1574 - 325 x325 - 325 x24

= 325 x (1574 -325 - 24)

=325 x 1225

=325 x 1000+325 x 100 +325 x125

=325000+32500+40625

=390125

d)175 x 1274 - 175 x 273 - 175

=175 x (1274-273-1)

=175 x 1000

=175000

Bài làm

Bài 1 : Tính nhanh 

a) 10000 - 47x 7 -47 x 28

= 47x(10000-28)

=47x9972

=468684

b) 54x 47 - 53x 47 - 47

=47x(54-53)-47

=47x1-47

=47-47

=0

c)175 x 1274 - 175 x 273 - 175

=175x(1274-273)-175

=175x1001-175

=175175-175

=175000

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