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\(\left(\frac{1}{4}+35\%+0,65+75\%\right)x\)\(\left(1\frac{6}{3}+4\frac{8}{24}\right)\)
\(=\left(\frac{1}{4}+\frac{7}{20}+\frac{13}{20}+\frac{3}{4}\right)\)\(x\left(3+\frac{13}{3}\right)\)
\(=\left(\frac{5}{20}+\frac{7}{20}+\frac{13}{20}+\frac{15}{20}\right)\)\(x7\)
\(=2x7\)
\(=14\)
6 2/7 + 7 3/5 + 8 6/9 + 9 1/4 + 2/5 + 5/7 + 1/3 x 3/4 + 1967
= 44/7 + 38/5 + 78/9 + 37/4 + 2/5 + 5/7 + 1/3 + 1967
= ( 44/7 + 5/7 ) + ( 38/5 + 2/5 ) + ( 26/3 + 1/3 ) + ( 37/4 + 3/4 ) +1967
= 7 + 8 + 9 + 10 + 1967
= 15 + 9 + 10 + 1967
= 24 + 10 + 1967
= 34 + 1967
= 2001
\(\frac{2}{3}\)x \(\frac{5}{8}\)x \(\frac{8}{15}\)= \(\frac{2}{3}\)x \(\frac{1}{15}\)= \(\frac{2}{45}\)
\(\frac{22}{5}\)x \(12\)x \(\frac{20}{40}\)= \(\frac{22}{5}\)x \(12\)x \(\frac{1}{2}\)= \(\frac{22}{5}\)x 6 = \(\frac{122}{5}\)
\(\frac{7}{2}\)x \(\frac{26}{7}\)x \(\frac{4}{13}\)= \(\frac{91}{7}\)x \(\frac{4}{13}\)
\(\frac{3}{4}.\frac{12}{7}+x=\frac{5}{2}\)
\(\frac{3.3}{1.7}+x=\frac{5}{2}\)
\(\frac{9}{7}+x=\frac{5}{2}\)
\(x=\frac{5}{2}-\frac{9}{7}\)
\(x=\frac{35}{14}-\frac{18}{14}\)
\(x=\frac{17}{14}\)
\(58,24+29,12.75+29,12.15+58,24.4\)
\(=\left(58,24+58,24.4\right)+\left(29,12.75+29,12.15\right)\)
\(=\left[58,24.\left(1+4\right)\right]+\left[29,12.\left(75+15\right)\right]\)
\(=\left[58,24.5\right]+\left[29,12.100\right]\)
\(=291,2+2912\)
\(=3203,2\)
_Chúc bạn học tốt_
58,24 + 29,12 * 75 + 29,12 * 15 + 58,24 * 4
= 58,24* (1+4) +29,12*(75+15)
= 58,24 * 5 + 29,12 * 90
= 291,2 + 2620,8 = 2912
75/100+3/4x19+75%x30+0,75x50
=0,75x1+0,75x19+0,75x30+0,75x50
=0,75x(1+19+30+50)
=0,75x100
=75
(75% + 0,65 + 1/4 + 35% ) x ( 5/4 + 125 x 3 + 12 x 0,625 )
=( \(\frac{3}{4}+0,65+\frac{1}{4}+3,5\) ) x ( \(\frac{5}{4}+125\)x 3 + 7,5 )
= ( 1 + 4,15 ) x ( \(\frac{5}{4}\) + 375 + 7,5 )
= 5,15 x 383,75
= 1976,3125
thank you dương tiến dũng nhiều nha . hihihi