Rút gọn các phân số sau:
75/200; 34/51; 36/84; 117/243
Giúp em nhoa
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\(\frac{15}{27}=\frac{5}{9}\)
\(\frac{33}{11}=3\)
\(\frac{75}{200}=\frac{3}{8}\)
\(\frac{80}{60}=\frac{4}{3}\)
Hướng dẫn: Chia cả tử và mẫu cho UCLN của chúng:
ƯCLN(-25 ,-75) = 25. Do đó:
\(\dfrac{121\times75\times130\times169}{39\times60\times11\times198}\)
\(=\dfrac{25\times169}{6\times18}\)
\(=\dfrac{4225}{108}\)
\(\dfrac{24}{32}=\dfrac{24:8}{32:8}=\dfrac{3}{4}\)
\(\dfrac{45}{6}=\dfrac{45:3}{6:3}=\dfrac{15}{2}\)
\(\dfrac{75}{100}=\dfrac{75:25}{100:25}=\dfrac{3}{4}\)
\(\dfrac{27}{63}=\dfrac{27:9}{63:9}=\dfrac{3}{7}\)
\(\dfrac{24}{32}=\dfrac{24:8}{32:8}=\dfrac{3}{4}\)
\(\dfrac{75}{100}=\dfrac{75:25}{100:25}=\dfrac{3}{4}\)
\(\dfrac{45}{60}=\dfrac{45:15}{60:15}=\dfrac{3}{4}\)
\(\dfrac{27}{63}=\dfrac{27:9}{63:9}=\dfrac{3}{7}\)
1) \(\dfrac{5}{10}=\dfrac{5:5}{10:5}=\dfrac{1}{2}\)
\(\dfrac{-18}{-27}=\dfrac{-18:\left(-9\right)}{-27:\left(-9\right)}=\dfrac{2}{3}\)
\(\dfrac{-42}{105}=\dfrac{-42:21}{105:21}=\dfrac{-2}{5}\)
\(\dfrac{75}{-135}=\dfrac{75:\left(-15\right)}{-135:\left(-15\right)}=\dfrac{-5}{9}\)
\(\dfrac5{10}=\dfrac{5.1}{5.2}=\dfrac12\\\dfrac{-18}{-27}=\dfrac{(-9).2}{(-9).3}=\dfrac23\\\dfrac{-42}{105}=\dfrac{21.(-2)}{21.5}=\dfrac{-2}5\\\dfrac{75}{-135}=\dfrac{(-15).(-5)}{(-15).9}=\dfrac{-5}9\)
75/200 = 3/8 36/84 = 3/7
34/51 = 2/3 117/243 = 13/27
\(\frac{75}{200}\)=\(\frac{3}{8}\); \(\frac{34}{51}\)=\(\frac{2}{3}\);\(\frac{36}{84}\)=\(\frac{3}{7}\); \(\frac{117}{243}\)=\(\frac{13}{27}\)
Đây nha bạn :))