Bài 1: Tính Nhanh
a) \(11\frac{1}{4}-\left(2\frac{5}{7}+5\frac{1}{4}\right)\)
b) \(\left(8\frac{5}{11}+3\frac{5}{8}\right)-3\frac{5}{11}\)
c) \(-\frac{1}{4}.13\frac{9}{11}-0,25.6\frac{2}{11}\)
d)\(\frac{4}{9}:\left(\frac{-1}{7}\right)+6\frac{5}{9}:\left(\frac{-1}{7}\right)\)
Bài 2: Tìm X
a)\(X:8,25=\left(-2,2\right)\)
b)\(-4\frac{1}{5}.X=2,25\)
c) \(\left(\frac{2X}{5}-1\right):\left(-5\right)=\frac{1}{7}\)
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Nhanh hộ em ạ ^^
b)\(\left(x-\frac{1}{2}\right):\frac{1}{3}+\frac{5}{7}=9\frac{5}{7}\)
Bài 1:Tính
1)\(\frac{7}{5}+\frac{-8}{5}\) ; 2)\(\frac{-6}{5}\times\frac{15}{24}\) ; 3) \(\left(\frac{2}{3}+1,5\right)-3,5:7\frac{1}{2}\) ; 4)\(\frac{5}{8}-\frac{-7}{9}\) ; 5)\(\frac{-7}{3}\times\frac{12}{28}\).
Bài 2:Tìm x
1)\(x-70=-45\) ; 2)\(\frac{4}{7}:x=\frac{12}{28}\) ; 3)\(\left(\frac{2}{3}x+1,5\right)-3,5:7\frac{1}{2}\) ;
4)x-50=-35 ;5)\(\frac{4}{7}\times x=\frac{11}{28}\) ;6)\(\left(\frac{2}{3}x+2,5\right):2\frac{2}{6}=6\)
m.n ơi!!!
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m.n có trước cho e ngày 28/4/2019 nhé :)
\(\frac{1}{4}+\frac{1}{3}:\left(2x-1\right)=-5\)
\(3\left(x-\frac{1}{2}\right)-5\left(x+\frac{3}{5}\right)=-x+\frac{1}{5}\)
\(\left(2x-3\right)\left(6-2x\right)=0\)
Tìm x biết :
a, \(\frac{1}{3}.x+\frac{2}{5}.\left(x-1\right)=0\)
b,\(3.\left(x-\frac{1}{2}\right)-5.\left(x+\frac{3}{5}\right)=x+\frac{1}{5}\)
bài 2:
a,\(6\frac{4}{5}\)-(\(1\frac{2}{3}\)+\(3\frac{4}{5}\))
b,\(6\frac{5}{7}\)-(\(1\frac{3}{4}\)+\(2\frac{5}{7}\))
c,\(7\frac{5}{9}\)-(\(2\frac{3}{4}\)+\(3\frac{5}{9}\))
d,\(7\frac{5}{11}\)-(\(2\frac{3}{7}\)+\(3\frac{5}{11}\))
e,\(\frac{-3}{5}\).\(\frac{5}{7}\)+\(\frac{-3}{5}\).\(\frac{15}{19}\)+\(\frac{5}{7}\)
f,\(\frac{1}{3}\).\(\frac{4}{5}\)+\(\frac{1}{3}\).\(\frac{6}{5}\)-\(\frac{4}{3}\)
g,\(\frac{4}{19}\).\(\frac{-3}{7}\)+\(\frac{-3}{7}\).\(\frac{15}{19}\)+\(\frac{5}{7}\)
h,\(\frac{5}{9}\).\(\frac{7}{13}\)+\(\frac{5}{9}\).\(\frac{9}{13}\)-\(\frac{5}{9}\).\(\frac{3}{13}\)
mn ơi,giúp mk với ạ,mk cần gấp
bài 1:
a,\(\frac{3}{5}\)+\(\frac{4}{15}\)
b,\(\frac{-3}{5}\)+\(\frac{5}{7}\)
c,\(\frac{5}{6}\):\(\frac{-7}{12}\)
d,\(\frac{-21}{24}\):\(\frac{-14}{8}\)
e,\(\frac{-3}{5}\).\(\frac{5}{7}\)+\(\frac{-3}{5}\).\(\frac{3}{7}\)+\(\frac{-3}{5}\).\(\frac{6}{7}\)
f,\(\frac{1}{3}\).\(\frac{4}{5}\)+\(\frac{1}{3}\).\(\frac{6}{5}\)-\(\frac{4}{3}\)
g,\(\frac{4}{19}\).\(\frac{-3}{7}\)+\(\frac{-3}{7}\).\(\frac{5}{19}\)+\(\frac{5}{7}\)
h,\(\frac{5}{9}\).\(\frac{7}{13}\)+\(\frac{5}{9}\).\(\frac{9}{13}\)-\(\frac{5}{9}\).\(\frac{3}{13}\)
mn ơi,giúp mk bài này với ạ,mk đag cần gấp
\(\left(3\frac{13}{39}-2\frac{463}{926}\right):\left(-5\frac{13}{39}+2\frac{433}{926}\right)\)
bài 1:thực hiện phép tính
a,\(\frac{65}{91}\)+\(\frac{-33}{55}\) b,\(\frac{36}{-84}\)+\(\frac{100}{450}\) c,\(\frac{3}{7}\)+\(\frac{1}{2}\)-\(\frac{-3}{70}\) d,\(\frac{3}{5}\)+\(\frac{-1}{25}\)-\(\frac{-35}{100}\)
bài 2:tìm x,bt
a,x-\(\frac{-1}{5}\)=\(\frac{7}{25}\) b,x+\(\frac{5}{11}\)=\(\frac{4}{-9}\) c,\(\frac{5}{9}\)+\(\frac{x}{-1}\)=\(\frac{-1}{3}\) d,|x-4|=|\(\frac{-6}{7}\)|+\(\frac{3}{2}\)
bài 3:tính nhanh(hợp lí)
a,A=\(\frac{2}{15}\)+\(\frac{2}{35}\)+\(\frac{2}{63}\)+\(\frac{2}{99}\)+\(\frac{2}{143}\)
b,B=\(\frac{1}{21}\)+\(\frac{1}{77}\)+\(\frac{1}{165}\)+\(\frac{1}{285}\)
c,so sánh C=\(\frac{1}{11}\)+\(\frac{1}{12}\)+\(\frac{2}{12}\)+.................+\(\frac{1}{20}\)với \(\frac{1}{2}\)
mn giúp mk với ạ,mk đag cần gấp lắm,phải nộp luôn ạ,lm ơn