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Tính:
\(\frac{\left(\frac{4}{7\cdot31}+\frac{6}{7\cdot41}+\frac{9}{10\cdot41}+\frac{10}{10\cdot57}\right)}{\left(\frac{7}{19\cdot31}+\frac{5}{19\cdot43}+\frac{3}{23\cdot43}+\frac{11}{23\cdot57}\right)}\)
Tính tỉ số frac{A}{B} biết : A frac{4}{7cdot31}+frac{6}{7cdot41}+frac{9}{10cdot41}+frac{7}{10cdot57}và B frac{7}{19cdot31}+ frac{5}{19cdot43} + frac{3}{23cdot43}+ frac{11}{23cdot57}
Đọc tiếp
Tính tỉ số \(\frac{A}{B}\) biết : A = \(\frac{4}{7\cdot31}\)+\(\frac{6}{7\cdot41}\)+\(\frac{9}{10\cdot41}\)+\(\frac{7}{10\cdot57}\)và B = \(\frac{7}{19\cdot31}\)+ \(\frac{5}{19\cdot43}\) + \(\frac{3}{23\cdot43}\)+ \(\frac{11}{23\cdot57}\)
Bài 1 :Tính tỉ số A/B biết a) Afrac{4}{7cdot31}+frac{6}{7cdot41}+frac{9}{10cdot41}+frac{7}{10cdot57}Bfrac{7}{19cdot31}+frac{5}{19cdot43}+frac{3}{23cdot43}+frac{11}{23cdot57}b)Afrac{40}{31cdot39}+frac{35}{39cdot46}+frac{30}{46cdot52}+frac{25}{52cdot57}Bfrac{91}{19cdot31}+frac{65}{19cdot43}+frac{39}{989}+frac{143}{1311}Bài 2 : Tính Avà B biết :a) Afrac{2006}{1cdot2}+frac{2006}{2cdot3}+...+frac{2006}{2006cdot2007}Bfrac{1}{1cdot2cdot3}+frac{1}{2cdot3cdot4}+...+frac{1}{2004cdot2005cdot2006}
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Bài 1 :Tính tỉ số A/B biết
a) \(A=\frac{4}{7\cdot31}+\frac{6}{7\cdot41}+\frac{9}{10\cdot41}+\frac{7}{10\cdot57}\)
\(B=\frac{7}{19\cdot31}+\frac{5}{19\cdot43}+\frac{3}{23\cdot43}+\frac{11}{23\cdot57}\)
b)\(A=\frac{40}{31\cdot39}+\frac{35}{39\cdot46}+\frac{30}{46\cdot52}+\frac{25}{52\cdot57}\)
\(B=\frac{91}{19\cdot31}+\frac{65}{19\cdot43}+\frac{39}{989}+\frac{143}{1311}\)
Bài 2 : Tính Avà B biết :
a) \(A=\frac{2006}{1\cdot2}+\frac{2006}{2\cdot3}+...+\frac{2006}{2006\cdot2007}\)
\(B=\frac{1}{1\cdot2\cdot3}+\frac{1}{2\cdot3\cdot4}+...+\frac{1}{2004\cdot2005\cdot2006}\)
Tính :
\(B=\left(\frac{7}{19\cdot31}+\frac{5}{19\cdot43}+\frac{3}{23\cdot43}+\frac{11}{23\cdot57}\right)\div\left(\frac{1}{31}-\frac{1}{57}\right)\)
\(B=\frac{4}{7\cdot31}+\frac{6}{7\cdot41}+\frac{9}{10\cdot41}+\frac{7}{10\cdot57}\)
Tính \(\frac{M}{N}\)biết :
M = \(\frac{2}{7\cdot19}+\frac{6}{7\cdot27}+\frac{1}{4\cdot9}+\frac{7}{12\cdot43}+\frac{8}{17\cdot43}\)
N = \(\frac{9}{7\cdot19}+\frac{5}{7\cdot33}+\frac{7}{10\cdot33}+\frac{11}{10\cdot31}\)
Tính nhanh :
A= \(\frac{24\cdot43-23}{24+47-23}\cdot\frac{3+\frac{3}{7}-\frac{3}{11}+\frac{3}{1001}-\frac{3}{13}}{\frac{9}{1001}-\frac{9}{13}+\frac{9}{7}-\frac{9}{11}+9}\)
Giải hộ đúng mk tick
Cho
A= \(\frac{4}{31\times7}+\frac{6}{7\times41}+\frac{9}{10\times41}+\frac{7}{10\times57}\)
B= \(\frac{7}{19\times31}+\frac{5}{19\times43}+\frac{3}{13\times43}+\frac{11}{23\times57}\)
Tính \(\frac{A}{B}\)
LM ƠN GIÚP TỚ NHÉ, TỚ CẦN GẤP LẮM, TỚ SẼ TIK CHO!!!!!!!
Tính1frac{5}{7}-frac{5}{7}.frac{2}{11}-frac{5}{7}.frac{9}{11}frac{3}{11}.frac{7}{19}.frac{17}{11}.frac{3}{9}-frac{3}{19}.frac{15}{11}frac{5}{11}.frac{18}{29}-frac{5}{11}.frac{8}{29}+frac{5}{11}.frac{19}{26}frac{17}{23}.frac{8}{16}.frac{27}{17}.80.frac{3}{4}left(frac{13}{23}+frac{1313}{2323}-frac{131313}{232323}right).left(frac{1}{3}+frac{1}{4}-frac{7}{12}right)
Đọc tiếp
Tính
\(1\frac{5}{7}-\frac{5}{7}.\frac{2}{11}-\frac{5}{7}.\frac{9}{11}\)
\(\frac{3}{11}.\frac{7}{19}.\frac{17}{11}.\frac{3}{9}-\frac{3}{19}.\frac{15}{11}\)
\(\frac{5}{11}.\frac{18}{29}-\frac{5}{11}.\frac{8}{29}+\frac{5}{11}.\frac{19}{26}\)
\(\frac{17}{23}.\frac{8}{16}.\frac{27}{17}.80.\frac{3}{4}\)
\(\left(\frac{13}{23}+\frac{1313}{2323}-\frac{131313}{232323}\right).\left(\frac{1}{3}+\frac{1}{4}-\frac{7}{12}\right)\)