\(\frac{254x399-145}{254+399x\left(254+1\right)}\)

\(=\frac{254x399-145}{254+399x254+399}\)

\(=\frac{-145}{254+399}\)

\(=\frac{-145}{653}\)

\(\frac{254.399-145}{254+399.253}=\frac{\left(253+1\right).399-145}{254+399.253}=\frac{253.399+\left(399-145\right)}{254+399.253}\)

                                                                               \(=\frac{253.399+254}{254+399.253}=1\)

\(\frac{254\times399-145}{254+399\times253}\)

\(=\frac{253\times399+399-145}{254+399\times253}\)

\(=\frac{253\times399+254}{254+399\times253}\)

\(=1\)

(253+1)x399-145/254+399x253

=253x399+(399-145)/254+399x253

=253x399+254/254+399x253

=1

Ta có:

\(\frac{254X399-145}{254+399X253}\)

\(=\frac{\left(253+1\right)X399-154}{254+399X253}\)

\(=\frac{253X399+399-154}{254+399X253}\)

\(=\frac{253X399+254}{253X399+254}\)

\(=1\)

bang 1

= 202292,42913385826771653543307087.............

=202292,4291338582677165353307087

(254 x 399 - 145) / (254 + 399 x 255)
=[( 253+1) x 399 -145]/(254 + 399 x 255)
=( 253 x 399 + 399 -145) /(254 + 399 x 255)
=(254 + 399 x 255)/(254 + 399 x 255)
=1

(254 x 399 - 145) / (254 + 399 x 255)
=[( 253+1) x 399 -145]/(254 + 399 x 255)
=( 253 x 399 + 399 -145) /(254 + 399 x 255)
=(254 + 399 x 255)/(254 + 399 x 255)
=1

(254 x 399 - 145) / (254 + 399 x 255)
=[( 253+1) x 399 -145]/(254 + 399 x 255)
=( 253 x 399 + 399 -145) /(254 + 399 x 255)
=(254 + 399 x 255)/(254 + 399 x 255)
=1

254 × 399 - 145 / 254 + 399 × 253

= (253 + 1) × 399 - 145 / 254 + 399 × 253

= 253 × 399 + (399 - 145) / 254 + 399 × 253

= 253 × 399 + 254 / 254 + 399 × 253

= 1

\(\frac{254x399-145}{254+399x253}\)

\(=\frac{253x399+399-145}{254+399x253}\)

\(=\frac{253x399+254}{254+399x253}=1\)

\(\frac{254.399-145}{254+399.253}=\frac{254.399-145}{\left(254-1\right).399+254}\)\(=\frac{254.399-145}{254.399-399+254}=\frac{254.399-145}{254.399-145}=1\)

DẤU . LÀ DẤU NHÂN NHA

254 x 399 - 145/254 + 339 x 253

= 101346 - 145/254 + 85767

= 187112,4291

\(\frac{254\cdot399-145}{254+399\cdot253}=\frac{\left(253+1\right)\cdot399-145}{254+399\cdot253}\)

\(=\frac{253\cdot399+399-145}{254+399\cdot253}\)

\(=\frac{253\cdot399+254}{254+399\cdot253}\)

\(=1\)