= ((5,2 x 5 + 0,25 ) x 4 + 1/2 ) x 2
= ( 26,25 x 4 + 0,5) x 2
= 105,5 x 2
= 211
{[( 5 + 1/5 ) * 5 + 1/4 ] * 4 + 1/2 }*2
={[ 26/5 * 5 + 1/4 ] * 4 + 1/2 } * 2
={[ 26 + 1/4 ] * 4 + 1/2 } * 2
={ 105/4 * 4 + 1/2 } * 2
={ 105 + 1/2} * 2
= 211/2 * 2
= 211
_Hok tốt_
Bài làm
\(\left\{\left[\left(5+\frac{1}{5}\right)x5+\frac{1}{4}\right]x4+\frac{1}{2}\right\}x2\)
\(=\left\{\left[\left(\frac{25}{5}+\frac{1}{5}\right)x5+\frac{1}{4}\right]x4+\frac{1}{2}\right\}x2\)
\(=\left\{\left[\frac{26}{5}x5+\frac{1}{4}\right]x4+\frac{1}{2}\right\}x2\)
\(=\left\{\left[26+\frac{1}{4}\right]x4+\frac{1}{2}\right\}x2\)
\(=\left\{\left[\frac{104}{4}+\frac{1}{4}\right]x4+\frac{1}{2}\right\}x2\)
\(=\left\{\frac{105}{4}x4+\frac{1}{2}\right\}x2\)
\(=\left\{105+\frac{1}{2}\right\}x2\)
\(=\left\{\frac{210}{2}+\frac{1}{2}\right\}x2\)
\(=\frac{211}{2}x2\)
\(=211\)
# Chúc bạn học tốt #
((( 5 + 1/5 ) * 5 + 1/4 ) * 4 + 1/2 ) * 2
=((5*5+1/5*5+1/4)*4+1/2)*2
=((25+1+1/4)*4+1/2)*2
=((26+1/4)*4+1/2)*2
=(26*4+1/4*4+1/2)*2
=(104+1+1/2)*2
=(105+1/2)*2
=105*2+1/2*2
=210+1
=211
