\(\frac{254\times399-145}{254+399\times253}=\frac{253\times399+399-145}{254+399\times253}=\frac{253\times399+254}{254+399\times253}=1\)

tai sao sao khi chuyển sang bên phải lại là hai số 253 vậy

phải có 5 bước

= 202292,4291.

Đúng 100% luôn!

Ai tk cho mình minh tk lại.

254 x 399 - 145 / 254 + 399 x 253

= 254 x 399 - 154 / ( 253 + 1 ) x 399 + 254

= 254 x 399 + 399  - 154 / 254 x 399 + 254

= 253 + 399 x 254 / 254 + 399 x 254

 = 1

Tk nha mina ~!~

#)Giải :

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

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

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

\(=1\)

B, \(\frac{5932+6001x5931}{5931x6001-69}\)

\(=\frac{5932+6001x5931}{\left(5931+1\right)x6001-69}\)

\(=\frac{5932+6001x5931}{5931x6001+6001-69}\)

\(=\frac{5932+6001x5932}{5932x6001+5932}\)

\(=1\)

         #~Will~be~Pens~#

\(\frac{254x399-145}{254+399x253}=\frac{\left(253+1\right)x399-145}{254+399x253}=\frac{253x399+1x399-145}{254+399x253}=\frac{253x399+254}{254+399x253}\)

\(=1\)

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

=\(\frac{\left(253+1\right)x399-145}{254+399x253}\)

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

=\(\frac{253.399+254}{254+399x253}\)=\(1\)

\(\frac{5932+6001x5931}{5931x6001-69}\)

=\(\frac{5932+6001x5931}{\left(5931+1\right)x6001-69}\)

=\(\frac{5932+6001x5931}{5931x6001+6001-69}\)

=\(\frac{5932+6001x5931}{5931x6001x5932}\)=1

# Hok tốt

\(\frac{5932+6001x5931}{5932x6001-69}=\frac{6001x5931+5932}{5931x6001+6001-69}=\frac{6001x5931+5932}{6001x5931+5932}=1\)

Câu a sai đề (sửa đề lại rồi làm tương tự câu b

Câu b 

\(\frac{5932+6001\times5931}{5932\times6001-69}=\frac{5932+6001\times5931}{\left(5931+1\right)\times6001-69}=\frac{5932+6001\times5931}{5931\times6001+6001-69}=\frac{5932+6001\times5931}{5932\times6001+5932}=1\)

\(254.399-\frac{145}{254+399.255}=101346-\frac{145}{101999}=1012031170\)

\(5932+6001.\frac{5931}{35597863}=1\)

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

bằng 1 đó

= 1 nha

Tính nhanh:

a) \(\frac{254.399-145}{254+399.253}\)

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

\(=\)\(\frac{253.399+399-145}{254+399.253}\)

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

\(=\)\(1\)

b) \(\frac{5932+6001.5931}{5932.6001-69}\)

\(=\)\(\frac{5932+6001.5931}{\left(5931+1\right).6001-69}\)

\(=\)\(\frac{5932+6001.5931}{5931.6001+6001-69}\)

\(=\)\(\frac{5932+6001.5931}{5932.6001+5932}\)

\(=\)\(1\)

a, 202292,4082

b, 36011793,2

101201/101201

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202292.4291