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\(\frac{18}{63}=\frac{18:9}{63:9}=\frac{2}{7}\)
\(\frac{54}{12}=\frac{54:6}{12:6}=\frac{9}{2}\)
\(\frac{27}{45}=\frac{27:9}{45:9}=\frac{3}{5}\)
\(\frac{135}{315}=\frac{135:45}{315:45}=\frac{3}{7}\)
a) 7/6 + 4/16 = 7/6 + 1/4 = 14/12 + 3/12 = 17/12
b) 2/12 + 15/6 = 1/6 + 15/6 = 16/6 = 8/3
c) 5/7 - 2/6 = 5/7 - 1/3 = 15/21 - 7/21 = 8/21
Chúc bạn học tốt.
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4/16=1/4
7/6+1/4=6/24+28/24=34/34=12/17
2/12=1/6
1/6+15/6=6/36+90/36=96/36=24/9
2/6=1/3
5/7-1/3=15/21-7/21=8/21
82/80=82:2/80:2=41/40
36/120=36:12/120:12=3/10
49/98=49:49/98:49=1/2
105/315=105:3/315:3=35/105=35:5/105:5=7/21 hoặc 105/315=105:15/315:15=7/21
114/1152=114:2/1152:2=57/576
t mình nha
\(\frac{2}{2}\)=\(\frac{1}{1}\)= 1 ;\(\frac{8}{10000}\)= \(\frac{1}{1250}\)
Lời giải:
$\frac{255}{272}=\frac{15\times 17}{16\times 17}=\frac{15}{16}$
\(\dfrac{255}{315}=\dfrac{255\div15}{315\div15}=\dfrac{17}{21}\)