Rut gon cac phan sop sau
d)\(\frac{2.5.13}{14.15}\)
e)\(\frac{9.6-9.3}{18}\)
f)\(\frac{17.5-17.2}{3-20}\)
Những câu hỏi liên quan
Bài 1: Rút gọn phân số.
a, 4.7/ 9.32
b, 3.21/ 14.15
c, 2.5.13/ 26.35
d, 9.6-9.3/ 18
e, 17.5-17/ 3-20
f, 49+7.49/ 49
Giúp mk với, cảm ơn các bn nhiều.
a) 4.79.32=4.79.4.8=79.8=772
b) 3.2114.15=3.3.72.7.3.5=32.5=310
c) 2.5.1326.35=2.5.132.13.5.7=17
d) 9.6–9.318=9.(6–3)9.2=6–32=32
e) 17.5–173–20=17.(5–1)–17=5–1–1=–4
f)
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a) \(\dfrac{4.7}{9.32}=\dfrac{4.7}{9.4.8}=\dfrac{7}{72}\)
b) \(\dfrac{3.21}{14.15}=\dfrac{3.3.7}{2.7.3.5}=\dfrac{3}{10}\)
c) \(\dfrac{2.5.13}{26.35}=\dfrac{2.5.13}{2.13.5.7}=\dfrac{1}{7}\)
d) \(\dfrac{9.6-9.3}{18}=\dfrac{9\left(6-3\right)}{9.2}=\dfrac{3}{2}\)
e) \(\dfrac{17.5-17}{3-20}=\dfrac{17\left(5-1\right)}{-17}=\dfrac{5-1}{-1}=-4\)
f) \(\dfrac{49+7.49}{49}=\dfrac{49\left(1+7\right)}{49}=8\)
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- Rút gọn các phân số sau đến tối giản:
a/\(\frac{2.5.13}{26.35}\)
b/\(\frac{2.-13.9.10}{-3.4.-5.26}\)
c/\(\frac{9.6-9.3}{18}\)
d/\(\frac{17.5-17}{3-20}\)
Rút gọn các phân số sau thành phân số tối giản:
a. \(\frac{3.5}{8.24}\)
b. \(\frac{3.21}{14.15}\)
c. \(\frac{3.7.11}{22.9}\)
d. \(\frac{9.6-9.3}{18}\)
e. \(\frac{17.5-17}{3-20}\)
Bài 1.Rút gọn
a,4.7/9.32
b,2.5.13/26.35
c,3.21/14.15
d,9.6-9.3/18
e,17.5-17/3-20
f,49+7.49
Bài 2 .Đổi ra m2 viết dưới dạng phân số tối giản
a,45 dm2 b, 300cm2
c, 57500 mm2
\(\frac{4\cdot7}{9\cdot32}=\frac{4\cdot7}{9\cdot8\cdot4}=\frac{7}{8\cdot9}=\frac{7}{72}\)
\(\frac{2\cdot5\cdot13}{26\cdot35}=\frac{2\cdot5\cdot13}{2\cdot13\cdot7\cdot5}=\frac{1}{7}\)
\(\frac{3\cdot21}{14\cdot15}=\frac{3\cdot3\cdot7}{2\cdot7\cdot3\cdot5}=\frac{3}{2\cdot5}=\frac{3}{10}\)
\(\frac{9\cdot6-9\cdot3}{18}=\frac{9\cdot\left(6-3\right)}{9\cdot2}=\frac{9\cdot3}{9\cdot2}=\frac{3}{2}\)
\(\frac{17\cdot5-17}{3-20}=\frac{17\cdot\left(5-1\right)}{-17}=\frac{17\cdot4}{17\cdot\left(-1\right)}=\frac{4}{-1}=-4\)
\(45dm^2=0,45m^2\)
\(300cm^2=0,03m^2\)
\(57500mm^2=0,0575m^2\)
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Rút gọn :
a) \(\dfrac{4.7}{9.32}\) b) \(\dfrac{3.21}{14.15}\) c) \(\dfrac{2.5.13}{26.35}\)
d) \(\dfrac{9.6-9.3}{18}\) e) \(\dfrac{17.5-17}{3-20}\) f) \(\dfrac{49+7.49}{49}\)
a) \(\dfrac{4.7}{9.32}=\dfrac{4.7}{9.4.8}=\dfrac{7}{72}\) b) \(\dfrac{3.21}{14.15}=\dfrac{3.7.3}{7.2.3.5}=\dfrac{3}{10}\)
c) \(\dfrac{2.5.13}{26.35}=\dfrac{2.5.13}{2.13.5.7}=\dfrac{1}{7}\) d)\(\dfrac{9.6-9.3}{18}\) \(=\dfrac{9.\left(6-3\right)}{9.2}=\dfrac{9.3}{9.2}=\dfrac{3}{2}\)
e) \(\dfrac{17.5-17}{3-20}=\dfrac{17.\left(5-1\right)}{-17}=-\dfrac{17.4}{17}=-4\) f) \(\dfrac{49+7.49}{49}=\dfrac{49.\left(1+7\right)}{49}=8\)
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rut gon : Q= \(\frac{25.4^{15}.9^9-2^9.6^{20}}{15.2^{25}.3^{19}-11.2^{11}.6^{18}}\)
`\(=\frac{5.5.4^{15}.9^9-2^9.6^{18}.6^2}{5.3.4^{12}.2.9^9.3-2^9.2^2.6^{18}.11}\)
\(=\frac{5.4^3-6^2}{3.2.3-2^2.11}\)
\(=\frac{320-36}{18-44}\)
\(=\frac{-284}{26}=\frac{-142}{13}\)
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Khong dung may tinh bo tui .Rut gon roi quy dong cac phan so sau
a)\(\frac{17}{20},\frac{13}{15}va\frac{41}{60}\)
b)\(\frac{25}{75},\frac{17}{34}va\frac{121}{132}\)
rut gon phan so a=\(\frac{-8^3\cdot6^4}{18^{12}}\)
a = \(\frac{-8^3.6^4}{18^{12}}\)
= \(\frac{-2^9.2^4.3^4}{2^{12}.3^{24}}\)
= \(\frac{-2^{13}.3^4}{2^{12}.3^{24}}\)
= \(\frac{-2}{3^{20}}\)
Hk tốt
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rut gon cac phan so sau
\(\frac{18.2+9}{27}\)
\(\frac{18.2+9}{27}=\frac{9.2.2+9}{3.9}=\frac{9\left(2.2+1\right)}{3.9}\)
\(\Rightarrow\frac{2.2+1}{3}=\frac{5}{3}\)
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