\(\frac{637\times527-189}{526\times637+448}\)

\(=\frac{637\times526+527-189}{526\times637-189+637}\)

\(=\frac{1+527-189}{1-189+637}\)

\(=\frac{1-189+527}{1-189+637}\)

\(=\frac{527}{449}=\frac{339}{449}\)

~ Hok tốt ~

trl

=334/449

hok tốt

a)1945*240-1000=465800

945+1945*239=465800

b)637*527-189=335510

526*637+448=335510

a: \(\frac{1989\cdot1990+3978}{1992\cdot1991-3984}\)

\(=\frac{1989\cdot\left(1989+1\right)+3978}{\left(1989+3\right)\left(1989+2\right)-3984}\)

\(=\frac{1989^2+1989+3978}{1989^2+5\cdot1989+6-3984}=\frac{1989^2+5967}{1989^2+5967}\)

=1

b: \(\frac{637\cdot527-189}{526\cdot637+448}\)

\(=\frac{637\cdot526+637-189}{637\cdot526+448}\)

\(=\frac{637\cdot526+448}{637\cdot526+448}\)

=1

406759.54

335918,116

\(\dfrac{637\times527-189}{526\times637+448}\)

\(=\dfrac{637\times\left(526+1\right)-189}{526\times637+448}\)

\(=\dfrac{637\times526+637-189}{526\times637+448}\)

\(=\dfrac{637\times526+448}{526\times637+448}\)

\(=\dfrac{1}{1}\)

\(=1\)

\(\dfrac{\left(637\cdot527-189\right)}{\left(526\cdot637+448\right)}\)

\(=\dfrac{\left(637\cdot526+637-189\right)}{\left(526\cdot637+448\right)}\)

\(=\dfrac{637\cdot526+448}{637\cdot526+448}=1\)

nhak lên các bạn ơi giúp mk đi

    526 x 637 + 448               335510

---------------------------- = ------------------------ = 1 

    637 x 527 -189               335510

Hok tốt nhé

# EllyNguyen #

D nha bn

D