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8 tháng 2 2019
Đặt \(A=\frac{9+\frac{9}{11}+\frac{18}{23}-\frac{27}{37}}{8+\frac{8}{11}+\frac{16}{23}-\frac{24}{37}}-\frac{2+\frac{16}{29}-\frac{24}{13}-\frac{32}{11}}{3+\frac{24}{29}-\frac{36}{13}-\frac{48}{11}}\)\(=\frac{9\left(1+\frac{1}{11}+\frac{2}{23}-\frac{3}{37}\right)}{8\left(1+\frac{1}{11}+\frac{2}{23}-\frac{3}{37}\right)}-\frac{2\left(1+\frac{8}{29}-\frac{12}{13}-\frac{16}{11}\right)}{3\left(1+\frac{8}{29}-\frac{12}{13}-\frac{16}{11}\right)}\)
\(=\frac{9}{8}-\frac{2}{3}\)(do \(1+\frac{1}{11}+\frac{2}{23}-\frac{3}{37};1+\frac{8}{29}-\frac{12}{13}-\frac{16}{11}\ne0\))
\(=\frac{27}{24}-\frac{16}{24}=\frac{11}{24}.\)
Vậy A = \(\frac{11}{24}.\)
12 tháng 4 2017
mk chỉ cần nhìn sơ qua là biết có câu dễ sao bn ko tự nghĩ đi hơi dễ rồi trừ khi bn đố tôi chục câu tiếng anh vật lí văn
16 tháng 5 2019
\(a.\frac{27.45+27.55}{2+4+6+...+14+16+18}=\frac{27.100}{\frac{\left(2+18\right).9}{2}}=30\)
\(b.\frac{26.108-26.12}{32-28+24-20+16-12+8-4}=\frac{26\left(108-12\right)}{\left(32-28\right).4}=\frac{26.96}{4.4}=156\)
\(c.\frac{27.4500+135.550.2}{2+4+6+...+14+16+18}=\frac{270.450+270.550}{\frac{\left(2+8\right).9}{2}}\)
\(d.\frac{48.700-24.45.20}{45-40+35-30+25-20+15-10+5}=\frac{48.700-48.450}{5.5}\)\(=\frac{48\left(700-450\right)}{25}=\frac{48.250}{25}=480\)
#ĐinhBa
BB
20 tháng 1 2017
a)\(\frac{-5}{13}+\left(\frac{3}{5}+\frac{3}{13}-\frac{4}{10}\right)=\frac{-5}{13}-\frac{3}{5}-\frac{3}{13}+\frac{4}{10}=\left(\frac{-5}{13}-\frac{3}{13}\right)+\frac{4}{10}-\frac{3}{5}=\frac{-5-3}{13}+\left(\frac{4}{10}-\frac{6}{10}\right)=\frac{-8}{13}+\frac{-2}{10}=\frac{-80}{130}+\frac{-26}{130}=\frac{-106}{130}=\frac{-53}{65}\)
TV
6 tháng 6 2017
phamthiminhtrang
\(a,x=\frac{3}{6}-\frac{8}{16}\)
\(\Rightarrow x=0\)
\(b,\frac{12}{16}:x=\frac{32}{64}\)
\(x=\frac{12}{16}:\frac{32}{64}\)
\(x=\frac{12}{16}\cdot\frac{64}{32}\)
\(x=\frac{3}{8}\)
6 tháng 6 2017
\(a,\)\(x\)\(=\frac{3}{6}-\frac{8}{16}=\frac{1}{2}-\frac{1}{2}=0\)
\(b,\)\(\frac{12}{16}\)\(:\)\(x\)\(=\frac{32}{64}\)
\(=>\) \(x\)\(=\)\(\frac{12}{16}:\frac{32}{64}\)
\(x\) \(=\)\(\frac{12}{16}.\frac{64}{32}\)
\(x\)\(=\)\(\frac{3}{4}.2\)
\(x\)\(=\)\(\frac{6}{4}=\frac{3}{2}\)
\(\frac{6}{2}+\frac{9}{24}=3+\frac{3}{8}=\frac{24}{8}+\frac{3}{8}=\frac{27}{8}\)
\(\frac{29}{16}+\frac{16}{32}=\frac{29}{16}+\frac{1}{2}=\frac{29}{16}+\frac{8}{16}=\frac{29+8}{16}=\frac{37}{16}\)
\(\frac{6}{2}+\frac{9}{24}=3+\frac{3}{8}=3\frac{3}{8}\)
\(\frac{29}{16}+\frac{16}{32}=\frac{29}{16}+\frac{8}{16}=\frac{37}{16}\)
\(\frac{6}{2}+\frac{9}{24}=\frac{6}{2}+\frac{3}{8}=\frac{24}{8}+\frac{3}{8}\)
\(=\frac{27}{8}\)
\(\frac{29}{16}+\frac{16}{32}=\frac{58}{32}+\frac{16}{32}=\frac{74}{32}\)
\(=\frac{37}{16}\)
\(\frac{6}{2}+\frac{9}{24}\) \(\frac{29}{16}+\frac{16}{32}\)
\(=\frac{72}{24}+\frac{9}{24}\) \(=\frac{58}{32}+\frac{16}{32}\)
\(=\frac{81}{24}\) \(=\frac{74}{32}\)
a)6/2+9/24=72/24+9/24=81/24=27/8
b)29/16+16/32=58/32+16/32=74/32=37/16
k nha bn
\(\frac{6}{2}+\frac{9}{24}=\frac{6}{2}+\frac{3}{8}=\frac{24}{8}+\frac{3}{8}=\frac{27}{8}.\)
\(\frac{29}{16}+\frac{16}{32}=\frac{29}{16}+\frac{8}{16}=\frac{37}{16}.\)
\(\frac{6}{2}+\frac{9}{24}=3+\frac{3}{8}=\frac{27}{8}\)
\(\frac{29}{16}+\frac{16}{32}=\frac{29}{16}+\frac{1}{2}=\)\(\frac{29}{16}+\frac{8}{16}=\frac{37}{16}\)
Ủng hộ nha...!
\(\frac{6}{2}+\frac{9}{24}=3+\frac{3}{8}=3\frac{3}{8}\)
\(\frac{29}{16}+\frac{16}{32}=\frac{29}{16}+\frac{1}{2}=\frac{29}{16}+\frac{8}{16}=\frac{29+8}{16}=\frac{37}{16}=2\frac{5}{16}\)
\(\frac{6}{2}+\frac{9}{24}=\frac{72}{24}+\frac{9}{24}=\frac{81}{24}=\frac{27}{8}\)
\(\frac{29}{16}+\frac{16}{32}=\frac{58}{32}+\frac{16}{32}=\frac{74}{32}=\frac{37}{16}\)
\(\frac{6}{2}+\frac{9}{24}=\frac{72}{24}+\frac{9}{24}=\frac{81}{24}\),\(\frac{29}{16}+\frac{16}{32}=\frac{58}{32}+\frac{16}{32}=\frac{74}{32}\)
a)\(\frac{6}{2}+\frac{9}{24}=\frac{144}{24}+\frac{9}{24}=\frac{153}{24}=\frac{27}{8}\)
b)\(\frac{29}{16}+\frac{16}{32}=\frac{58}{32}+\frac{16}{32}=\frac{84}{32}=\frac{21}{8}\)