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\(=\dfrac{3}{4}\left(28+23+1+48\right)=\dfrac{3}{4}\cdot100=75\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{75}{100}+\frac{3}{4}\times29+75\%\times30+0,75\times40\)
\(=0,75+0,75\times29+\frac{75}{100}\times30+0,75\times40\)
\(=0,75\times1+0,75\times29+0,75\times30+0,75\times40\)
\(=0,75\times\left(1+29+30+40\right)\)
\(=0,75\times100\)
\(=75\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(=\dfrac{3}{4}\left(1+29+30+40\right)=\dfrac{3}{4}\cdot100=75\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{75}{100}+\frac{3}{4}\times29+75\%\times30+0,75\times40\)
\(=0,75+0,75\times29+0,75\times30+0,75\times40\)
\(=0,75\times(1+29+30+40)\)
\(=0,75\times100\)
\(=75\)
(75 / 100) + ((3 / 4) x 29) + (75% x 30) + (0,75 x 40) =
75 |
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 28/140=0.2 b) 2 23/75=2.3066
33/75=0.44 4 216/900=4.24
261/900=0.29 1 415/1250=1.332
415/1250=0.332 5 28/140=5.2
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\dfrac{3}{4}\) x 28 + 75% x 33 + \(\dfrac{75}{100}\) + 0,75 x 28
= 0,75 x 28 + 0,75 x 33 + 0,75 x 1 + 0,75 x 28
= 0,75 x ( 28 + 33 + 1 + 28 )
= 0,75 x 90
= 67,5
đáp án đúng là 67,5