\(=\dfrac{5\cdot9\left(2-2\cdot3+3\cdot4\right)}{10\cdot18\left(2-2\cdot3+3\cdot4\right)}=\dfrac{1}{4}\)
5 .18-10.27+15.36/10.36-20.54+30.72
Tính nhanh
a)\(\frac{120-\left(-0,5\right).\left(-40\right).\left(-5\right).\left(-0,2\right).20.0,25}{5+10+15+...+1995}\)
b)\(\frac{5.18-10.27+15.36}{10.36-20.54+30.72}\)
c)\(\left(\frac{1}{2}-1\right)\left(\frac{1}{3}-1\right)\left(\frac{1}{4}-1\right)...\left(\frac{1}{1999}-1\right)\)
5.18-10.27+15.36
10.36-20.54+30.72 cái đường thẳng ở trên là phần nhé!
Tính nhanh
f) \(\frac{2.6^9-2^5.18^4}{2^6.6^8}\)
Tính nhanh :
f) \(\frac{2.6^9-2^5.18^4}{2^6.6^8}\)
h) \(\frac{4^6.9^5+6^9.120}{8^4.3^{12}-6^{11}}\)
a/(\(\frac{2}{3}-\frac{3}{4}\))2 x\(\frac{12}{7}-\frac{5}{7}\)
b/ 3.5 + \(\sqrt{1.96}-\sqrt{10.36}\)
làm giúp nha mai phải nộp rùi....
ngày 18/10/2016 là hạn nộp....
thanks nha....
1)\(\frac{2.6^9-2^5.18^4}{2^2.6^8}\)
2)\(\frac{10^{2006}.7^{2007}}{2^{2005}.35^{2007}}\)
3)\(\frac{3^{186}.25^{50}}{15^{100}.27^{29}}\)
\(\dfrac{\dfrac{2}{5}-\dfrac{2}{9}+\dfrac{2}{11}}{\dfrac{7}{5}-\dfrac{7}{9}+\dfrac{7}{11}}-\dfrac{\dfrac{1}{3}-}{1\dfrac{1}{6}-}\dfrac{\dfrac{1}{4}}{\dfrac{7}{8}+}\dfrac{+\dfrac{1}{5}}{0,7}\)
Tinh
a)M=\(\dfrac{2012-\dfrac{1}{9}-\dfrac{2}{10}-\dfrac{3}{11}-...-\dfrac{2012}{2020}}{\dfrac{1}{27}+\dfrac{1}{30}+\dfrac{1}{33}+...+\dfrac{1}{6060}}\)
b)N=\(\dfrac{\dfrac{1}{1.300}+\dfrac{1}{2.301} +\dfrac{1}{3.302}+...+\dfrac{1}{101.400}}{\dfrac{1}{1.102}+\dfrac{1}{2.103}+\dfrac{1}{3.104}+...+\dfrac{1}{299.400}}\)
Tính nhanh:
\(a,A=\dfrac{\dfrac{5}{4}+\dfrac{5}{5}+\dfrac{5}{7}-\dfrac{5}{11}}{\dfrac{10}{4}+\dfrac{10}{5}+\dfrac{10}{7}-\dfrac{10}{11}}\)\(b,B=\dfrac{2+\dfrac{6}{5}-\dfrac{6}{7}-\dfrac{6}{11}}{\dfrac{2}{3}+\dfrac{2}{5}-\dfrac{2}{7}-\dfrac{2}{11}}\)
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