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\(\frac{7}{30}.\frac{12}{37}+\frac{12}{30}.\frac{23}{37}.\frac{13}{31}-\frac{-25}{37}.\frac{18}{31}\)
bài 1 tính bằng cách hợp lí nếu có thểfrac{-5}{12}-frac{-3}{24}b) 5frac{5}{13}-(1frac{1}{2}+3frac{5}{13})c)frac{-13}{37}.frac{5}{23}+frac{-13}{37}.frac{18}{23}+frac{50}{37}d)(0,5 -frac{3}{2}):1frac{1}{6}+75%bài 2 tìm x biết-7/5 +x -3/4-7/4 + 1/4 : x 3/2
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bài 1 tính bằng cách hợp lí nếu có thể
\(\frac{-5}{12}\)-\(\frac{-3}{24}\)=
b) 5\(\frac{5}{13}\)-(1\(\frac{1}{2}+3\frac{5}{13}\))
c)\(\frac{-13}{37}.\frac{5}{23}+\frac{-13}{37}.\frac{18}{23}+\frac{50}{37}\)
d)(0,5 -\(\frac{3}{2}\)):1\(\frac{1}{6}+75\%\)
bài 2 tìm x biết
-7/5 +x = -3/4
-7/4 + 1/4 : x = 3/2
Bài 1:1. Rút gọn:a) Afrac{9^3.25^3}{18^2.125^2}b) Bfrac{18}{37}+frac{8}{2017}+frac{19}{37}-1frac{2009}{2017}+frac{2017}{2018}2.CHO Mfrac{2}{5.14}+frac{2}{7.18}+frac{2}{9.22}+frac{2}{11.26}+frac{2}{13.30}.so sánh M &frac{3}{46}Bài 2: Tim x,biết:a) left(2x-1right)^2-25b)frac{148-x}{25}+frac{164-x}{23}+frac{186-x}{21}+frac{199-x}{19}10
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Bài 1:1. Rút gọn:
a) \(A=\frac{9^3.25^3}{18^2.125^2}\)
b) \(B=\frac{18}{37}+\frac{8}{2017}+\frac{19}{37}-1\frac{2009}{2017}+\frac{2017}{2018}\)
2.CHO \(M=\frac{2}{5.14}+\frac{2}{7.18}+\frac{2}{9.22}+\frac{2}{11.26}+\frac{2}{13.30}\).so sánh M &\(\frac{3}{46}\)
Bài 2: Tim \(x\),biết:
a) \(\left(2x-1\right)^2-25\)
b)\(\frac{148-x}{25}+\frac{164-x}{23}+\frac{186-x}{21}+\frac{199-x}{19}=10\)
\(\frac{49}{48}x\frac{64}{63}x\frac{81}{80}x\frac{100}{99}x\frac{121}{120}\)
\(\frac{7}{6}+\frac{13}{12}+\frac{21}{20}+\frac{31}{30}+\frac{43}{42}+\frac{57}{56}\)
Tìm x biết :
a) \(\frac{1}{2013}\times x+1+\frac{1}{2}+\frac{1}{6}+\frac{1}{12}+...+\frac{1}{2012\times2013}=2\)
b)\(2x+\frac{7}{6}+\frac{13}{12}+\frac{21}{20}+\frac{31}{30}+\frac{43}{42}+\frac{57}{56}+\frac{73}{72}+\frac{91}{90}=10\)
Bài: Tìm x:
a) \(x+\frac{7}{12}=\frac{17}{18}-\frac{1}{9}\)
b) \(\frac{29}{30}-\left(\frac{13}{23}+x\right)=\frac{7}{69}\)
Bài 1: Tính:a) 8frac{2}{3}: ( 6frac{2}{3}- 4frac{1}{2}) - 2frac{27}{51}b) ( 5frac{5}{12}- 4frac{1}{15}) x 3frac{3}{4}+ 2frac{3}{8}c) frac{1}{12}+ frac{13}{35}+ frac{5}{6}+ frac{23}{35}d) frac{13}{18}x frac{24}{37}+ frac{24}{37} x frac{2}{9}+ frac{24}{37}x frac{1}{18}Giúp mình nha!
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Bài 1: Tính:
a) 8\(\frac{2}{3}\): ( 6\(\frac{2}{3}\)- 4\(\frac{1}{2}\)) - 2\(\frac{27}{51}\)
b) ( 5\(\frac{5}{12}\)- 4\(\frac{1}{15}\)) x 3\(\frac{3}{4}\)+ 2\(\frac{3}{8}\)
c) \(\frac{1}{12}\)+ \(\frac{13}{35}\)+ \(\frac{5}{6}\)+ \(\frac{23}{35}\)
d) \(\frac{13}{18}\)x \(\frac{24}{37}\)+ \(\frac{24}{37}\) x \(\frac{2}{9}\)+ \(\frac{24}{37}\)x \(\frac{1}{18}\)
Giúp mình nha!
Tìm x : \(2x+\frac{7}{6}+\frac{13}{12}+\frac{21}{20}+\frac{31}{30}+\frac{43}{42}+\frac{57}{56}+\frac{73}{72}+\frac{91}{90}=10\)10
Tìm x:
\(\frac{\left(13\frac{2}{9}-15\frac{2}{3}\right)\cdot\left(30^2-5^4\right)}{\left(18\frac{3}{7}-17\frac{1}{4}\right)\cdot\left(25-12\cdot5^2\right)}\cdot x=\frac{\frac{2}{11}+\frac{3}{13}+\frac{4}{15}+\frac{5}{17}}{4\frac{1}{11}+\frac{5}{13}+\frac{9}{15}+\frac{13}{17}}\)