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a ) Sắp sếp theo thứ tự tăng dần :
- 2015 ; - 53 ; - 25 ; - 7 ; - 1 ; 0 ; 7 15 ; 53
b ) Rút gọn phân số rồi so sáh
\(\frac{3.4+3.7}{6.5+24}\) = \(\frac{1.1+1.7}{3.5+8}\)= \(\frac{7}{23}\)
\(\frac{23.5-23}{46+3.23}\) = \(\frac{1.5-1}{2+3.1}\) = \(\frac{4}{5}\)
\(\frac{7}{23}=\frac{7.5}{23.5}=\frac{35}{115}\)
\(\frac{4}{5}=\frac{4.23}{5.23}=\frac{92}{115}\)
Vì \(\frac{35}{115}< \frac{92}{115}\Rightarrow\frac{3.4+3.7}{6.5+24}< \frac{23.5-23}{46+3.23}\)
Tk mk nha
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\(\frac{3.4+3.7}{6.5+9}=\frac{3\left(4+7\right)}{30+9}=\frac{3.11}{39}=\frac{33}{39}=\frac{11}{13}\)
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a: 27/-180=-27/180=-3/20=-21/140
-6/-35=6/35=24/120
-3/-28=3/28=15/140
b: \(\dfrac{3\cdot4+3\cdot7}{6\cdot5+9}=\dfrac{3\left(4+7\right)}{30+9}=\dfrac{11}{13}=\dfrac{2849}{13\cdot259}\)
\(\dfrac{6\cdot9-2\cdot17}{63\cdot6-119}=\dfrac{54-34}{259}=\dfrac{20}{259}=\dfrac{260}{259\cdot13}\)
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a) -15/90= -5/30= -1/6
120/600=1/5
-75/150= -25/50= -1/2
b)3.4+3.7/6.5+9
=3.(4+7)/3.2+3 .3
=11/2+3.3
=11/11=1
6.9-2.17/63.3-11.9
=2.3.3.3-2.17/7.3.3-11.3.3
=2-2.17/7.3-11
= 2-2.17/10
=2-2.17/2.5
=2-17/5
=-15/5=-3