Bài 1: Thực hiện phép tính bằng cách hợp lí < nếu có thể >
a, \(\left(-1,5\right).\left(1+\frac{2}{3}\right)+1,4.\frac{15}{49}-\left(\frac{4}{5}+\frac{2}{3}\right):2\frac{1}{5}\)
b, \(\frac{7}{5}+\frac{4}{5}\left(\frac{5}{8}-\frac{7}{4}\right)+2014^0\)
c, \(1\frac{3}{25}+\frac{17}{19}-\frac{3}{25}+0,9+\frac{2}{19}\)
d, \(-\frac{5}{9}.\frac{6}{13}+\frac{-5}{9}.\frac{7}{23}+\frac{5}{23}:\frac{9}{7}\)
Bài 2: Tìm x, biết
a, 20%x + 0,4x = 4,5
b, \(\left(3\frac{1}{2}-2\left|x-1\right|\right).2\frac{2}{3}=5\frac{1}{3}\)
HELP MEEEEE
Bài 1: Thực hiện phép tính bằng cách hợp lí ( nếu có thể )
a, \(\left(-1,5\right).\left(1+\frac{2}{3}\right)+1,4.\frac{15}{49}-\left(\frac{4}{5}+\frac{2}{3}\right):2\frac{1}{5}\)
b, \(\frac{7}{5}+\frac{4}{5}\left(\frac{5}{8}-\frac{7}{4}\right)+2014^0\)
c, \(1\frac{3}{25}+\frac{17}{19}-\frac{3}{25}+0,9+\frac{2}{19}\)
d, \(-\frac{5}{9}.\frac{6}{13}+\frac{-5}{9}.\frac{7}{23}+\frac{5}{23}:\frac{9}{7}\)
Bài 2: Tìm x, biết:
a, 20%x + 0,4x = 4,5
b, \(\left(3\frac{1}{2}-2\left|x-1\right|\right).2\frac{2}{3}=5\frac{1}{3}\)
HELP ME!
Bài 1: Thực hiện phép tính
a, \(\frac{4}{9}.\frac{2}{6}\)
b, \(1\frac{1}{3}.\left(0,5\right)+\left(\frac{8}{15}-\frac{19}{30}\right):\frac{6}{15}\)
Bài 2: Tìm x, biết
a, \(\left(\frac{2}{7}.x+\frac{3}{7}\right):2\frac{1}{5}-\frac{3}{7}=1\)
HELP ME!!!!!!!!!!!!!
a, \(\left(12-\frac{7}{18}-10\frac{13}{18}\right):x-1\frac{7}{13}=1\frac{2}{3}\)
b,\(\left[\left(6\frac{3}{7}-\frac{0,75x-2}{0,35}\right).2,8+1,75\right]:0,05=235\)
c.\(\frac{3-x}{5-x}=\left(\frac{3}{5}\right)^2\)
d,\(\left(1-\frac{3}{10}-x\right):\left(\frac{19}{10}-1-\frac{2}{5}\right)+\frac{4}{5}=1\)
e,\(\left(12\frac{7}{18}-10\frac{13}{18}\right):x-1\frac{7}{33}:\frac{8}{11}=1\frac{2}{3}\)
các bạn ơi giúp tớ với
Tính
1) \((\)\(\frac{55}{3}\)\(\div\)15+\(\frac{26}{3}\)\(\times\)\(\frac{7}{2}\)\()\)\(\div\)\([(\)\(\frac{37}{3}+\frac{62}{7})\times\frac{7}{18}]\div\frac{-1704}{445}\)
2) (\(\frac{1771}{25}\div23)\div\frac{77}{10}+11,45-(2,225-\frac{11}{8})]\times\frac{8}{55}\)
3) \([\frac{109}{6}-\left(0,06\div\frac{15}{2}+\frac{17}{5}\times0,38\right)]\div\left(19-\frac{8}{3}\times\frac{19}{4}\right)\)
Bài 1:Tìm x biết Bài 2:So sánh
a, \(x+\frac{1}{2}=\frac{3}{8}.\frac{4}{5}\) a, \(A=\frac{10^{10}-1}{10^{11}-1}vaB=\frac{10^9-1}{10^{10}-1}\)
b, \(\frac{5}{16}:x-\frac{1}{4}=\frac{5}{8}\) b, B =\(\frac{10^{10}}{10^{10}+1}vaB=\frac{10^{10}+1}{10^{10}+2}\)
c, \(\frac{-1}{4}.x+\frac{3}{7}.x=2\)
d, \(\frac{22}{9}-\left(x+\frac{1}{2}\right)^2=\frac{7}{3}\)
e, \(\left|\frac{1}{4}-x\right|+5\frac{1}{8}=6\frac{1}{8}\)
Bài 1: Thực hiện phép tính:
a, \(\left(\frac{3}{8}+\frac{-3}{4}+\frac{7}{12}\right):\frac{5}{6}+\frac{1}{2}\)
b, \(\frac{-3}{7}.\frac{5}{9}+\frac{4}{9}.\frac{-3}{7}+2\frac{3}{7}\)
Bài 2: Tìm x
a, \(\frac{2}{3}.x-\frac{1}{2}.x=\frac{5}{12}\)
b, \(\left(2\frac{4}{5}x-50\right):\frac{2}{3}=51\)
\(\frac{9}{19}-\frac{4}{5}:\frac{2}{5}b,\frac{2}{9}:\frac{2}{3}^x\frac{1}{2}\)
bài 1:
a)\(\frac{11x-1}{4}=\frac{5}{2}\)
b)\(\left(3x-6\right).\left(\frac{x}{9}-\frac{1}{3}\right)=0\)
c)\(M=c.\frac{5}{7}+c.\frac{7}{14}-c.\frac{17}{14}vớic=\frac{2018}{2019}-\frac{2019}{2020}\)
d)\(N=\frac{-7}{13}+\left(2-\frac{19}{13}\right)+\frac{2020}{2018}:\frac{202}{2018}\)
CÁC BẠN GIẢI GIÚP MÌNH NHA☺