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\(15:1,5+2,5:1,5+2,5 \times0,2\)
\(=10+\dfrac{5}{3}+0,5\)
\(=\dfrac{73}{6}\)
\(#YH \)\(#NBaoNgoc\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 8,8 : 2,5 + 7,6 : 2,5 - 6,4 : 2,5
= (8,8 + 7,6 - 6,4) : 2,5
= 10 : 2,5
= 4
\(a.\)
\(8.8:2.5+7.6:2.5-6.4:2.5\)
\(=\left(8.8+7.6-6.4\right):2.5\)
\(=10:2.5\)
\(=4\)
\(b.\)
\(0.25\times1200+125\times1.5\times2-250\times2.6\)
\(=250\times1.2+250\times1.5-250\times2.6\)
\(=250\times\left(1.2+1.5-2.6\right)\)
\(=250\times0.1=25\)
\(c.\)
\(\left(32\times11-3200\times0.1-32\right):\left(81.6\times27.3-17.3\times81.6\right)\)
\(=\left[32\times\left(11-10-1\right)\right]:\left[81.6\times\left(27.3-17.3\right)\right]\)
\(=0\)
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\(x.2,5-x.1,5=5\)
\(x.\left(2,5-1,5\right)\)\(=5\)
\(x.1=5\)
\(x=5:1\)
\(x=5\)
![](https://rs.olm.vn/images/avt/0.png?1311)
(x + 0,5) + (x + 1,5) + (x + 2,5) = 33
x.3+(0,5+1,5+2,5)=33
x.3+4,5=33
x.3=33-4,5
x.3=28,5
x=28,5÷3
x=9,5
![](https://rs.olm.vn/images/avt/0.png?1311)
[ x + 0,5 ] + [ x + 1,5 ] + [ x + 2,5 ] = 33
x + 0,5 + x + 1,5 + x + 2,5 = 33
3x + 4,5 = 33
3x = 28,5
x = 9,5
hok tốt
#linhtam#
\(2,5:x=2,5:1,5\)
\(2,5:x=\frac{5}{3}\)
\(\Rightarrow x=2,5:\frac{5}{3}=1,5\)
\(\Rightarrow x=1,5\)
Ủng hộ mk nka!^_^
đáp án là 1.5
k mình nha