Bài 2:
Ta có:\(\dfrac{x+46}{20}=x+\dfrac{2}{5}\)
\(\Leftrightarrow\dfrac{x+46}{20}=\dfrac{5x+2}{5}\)
=>100x+40=5x+230
=>95x=190
hay x=2
rút gọn phân số sau thành phân số tối giản
a,\(\dfrac{5^3.90.4^3}{25^{2^{ }}.3^{2^{ }}.2^{13}}\)
b, \(\dfrac{18.27+18.\left(-23\right)}{34.4-4.52}\)
c, \(\dfrac{15^{2^{ }}.16^{4^{ }}-15^3.16^3}{12^2.20^3-20^2.12^3}\)
d,\(\dfrac{2.3+4.6+14.21}{3.5+6.10+21.35}\)
rút gọn :
a) \(\frac{5^3.90.4^3}{25^2.3^2.2^{13}}\)
b) \(\frac{18.27+18.\left(-23\right)}{34.4-4.52}\)
c) \(\frac{15^2.16^4-15^3.16^3}{12^2.20^3-20^2.12^3}\)
d) \(\frac{2.3+4.6+14.21}{3.5+6.10+21.35}\)
Bài 1: rút gọn các phân số
A) 31995-81/ 42660- 108
B) 7.2.7.5^2/ 14.2.5
C) 2^2 . 3^3 . 5/ 3.2^3.5^3
D) 5^3.90.4^3 / 25^2 . 3^2 . 2^13
E) 18.27+ 18.(-23)/ 34.4-4.52
F) 15^2.16^4-15^3.16^3/ 12^2.20^3-20^2.12^3
G) 2.3+4.6+14.21/3.5+6.10+21.35
Bài 1: rút gọn các phân số
\(\frac{5^3.90.4^3}{25^2.3^2.2^{13}}\)
\(\frac{18.27+18.\left(-23\right)}{34.4-4.52}\)
\(\frac{15^2.16^4-15^3.16^3}{12^2.20^3-20^2.12^3}\)
\(\frac{2..3+4.6+14.21}{3.5+6.10+21.35}\)
Giúp mik nha
Rút gọn các phân số sau:
a, \(\dfrac{5^3.90.4^3}{25^2.3^2.2^{13}}\)
b, \(\dfrac{15^2.16^4-15^3.16^3}{12^2.20^3-20^2.12^3}\)
HELP ME ~
Rút gọn các phân số sau :
\(\dfrac{5^3.90.4^3}{25^2.3^2.2^{13}}\)
\(\dfrac{15^2.16^4.15^3.16^3}{12^2.20^3.20^2.12^3}\)
giup minh nha , mai minh nop roi
hepl me
Bài 1; Tính
a)\(\left(\dfrac{5}{18}-\dfrac{7}{24}+\dfrac{1}{9}\right):\dfrac{7}{18}\)
b)\(\left(\dfrac{7}{20}-\dfrac{5}{16}+\dfrac{3}{40}\right):\left(\dfrac{4}{15}-\dfrac{3}{10}+\dfrac{1}{12}\right)\)
Bài 2:Tìm x
a)\(\dfrac{3}{10}-x=\dfrac{5}{6}-\dfrac{2}{15}\)
b)\(\dfrac{-5}{8}+x=\dfrac{4}{9}-\dfrac{7}{1}\)
c)\(\dfrac{2}{x-3}=\dfrac{x-3}{18}\)
Giúp mk zới m.n mk gấp lắm mk tick cho
tìm x:
a) \(-8:\left(4\dfrac{1}{5}x+\dfrac{3}{10}\right)=4\dfrac{4}{9}\)
b) \(4\dfrac{2}{3}-\left(\dfrac{3}{5}:x\right)=-20\%\)
c) \(\left(\dfrac{13}{10}x-15\right).-\dfrac{5}{14}=3\)
d) \(\left(5,5x-44\right):\left(-\dfrac{3}{2}\right)=30\)
e) \(\dfrac{11}{14}:\left(2x+\dfrac{5}{7}\right)=-\dfrac{11}{18}\)
Bài 1: Tìm x, biết:
a, \(\left(x+\dfrac{1}{4}-\dfrac{1}{3}\right):\left(2+\dfrac{1}{6}-\dfrac{1}{4}\right)=\dfrac{7}{46}\)
b, \(\dfrac{13}{15}-\left(\dfrac{13}{21}+x\right).\dfrac{7}{12}=\dfrac{7}{10}\)
Bài 2: Thực hiện phép tính:
a, \(\left(2\dfrac{5}{6}+1\dfrac{4}{9}\right):\left(10\dfrac{1}{12}-9\dfrac{1}{2}\right)\)
b, 1\(\dfrac{5}{18}-\dfrac{5}{18}.\left(\dfrac{1}{15}+1\dfrac{1}{12}\right)\)
c, \(-\dfrac{1}{7}.\left(9\dfrac{1}{2}-8,75\right):\dfrac{2}{7}+0,625:1\dfrac{2}{3}\)
