\(=182\cdot32+182\cdot68=182\cdot100=18200\)
\(=182\cdot32+182\cdot68=182\cdot100=18200\)
Tính Nhanh \(A=\left(1+12\right).\left(1+13\right).\left(1+14\right).\left(1+15\right).\left(1+16\right).\)
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Em cám ơn nhiều ạ!
tinh nhanh
\(\left(1-\dfrac{28}{10}\right).\left(1-\dfrac{52}{22}\right).\left(1-\dfrac{80}{36}\right)....\left(1-\dfrac{21808}{10900}\right)\)
tính nhanh
B=\(\left(\dfrac{1}{3}-1\right)+\left(\dfrac{1}{6}-1\right)+\left(\dfrac{1}{10}-1\right)+...+\left(\dfrac{1}{45}-1\right)\)
tinh nhanh\(\left(1-\dfrac{1}{21}\right).\left(1-\dfrac{1}{28}\right)....\left(1-\dfrac{1}{1326}\right)\)
Tính nhanh
B=\(\left(\dfrac{1}{3}-1\right)+\left(\dfrac{1}{6}-1\right)+\left(\dfrac{1}{9}-1\right)+...+\left(\dfrac{1}{45}-1\right)\)
tính nhanh
a) \(\frac{-3}{7}+\frac{5}{13}+\frac{3}{7}\)
b)\(\frac{-5}{21}+\frac{-2}{21}+\frac{8}{24}\)
c) \(\frac{-5}{11}+\left(\frac{-6}{11}+2\right)\)
d)\(\left(\frac{-1}{32}+\frac{1}{2}\right)+\frac{-15}{32}\)
Tính :
C = \(\left(1+\dfrac{1}{2.3}\right)\) \(\left(1+\dfrac{1}{2.4}\right)\) \(\left(1+\dfrac{1}{3.5}\right)\) .....\(\left(1+\dfrac{1}{2014.2016}\right)\)
Tính
B = \(\left(\dfrac{1}{4}-1\right)+\left(\dfrac{1}{9}-1\right)+\left(\dfrac{1}{16}-1\right)....\left(\dfrac{1}{400}-1\right)\)
Tính nhanh:
A= \(\dfrac{\left(-4\right).190.9+12.270.\left(-3\right)+\left(-18\right).2.540}{5+10+15+...+195+200+1900}\)
Cảm ơn ạ