Tuyển Cộng tác viên Hoc24 nhiệm kì 26 tại đây: https://forms.gle/dK3zGK3LHFrgvTkJ6
2^4.5-[131-(130-4)^2]
=16.5-[131-126^2]
=80-[131-15876]
=80--15745
=80+15745
=15825
\(2^4.5-\left[131-\left(130-4\right)^2\right]=1280-\left[131-15876\right]=1280-\left(-15745\right)=17025\)
Tính giá trị của biểu thức sau:
a.\(2^4.5-\left[131-\left(13-4^2\right)\right]\)
b.\(\frac{-3}{5}+\frac{28.43}{5.56}+\frac{28.5}{5.24}-\frac{28.21}{5.63}\)
rút gọn các phân số sau
\(\dfrac{2.\left(-13\right).9.10}{\left(-3\right).4.\left(-5\right).26}\)
\(\dfrac{2^2.2^3.5^7}{2^3.3^4.5^6}\)
Tính
\(17^0+\left[5^{13}:5^{11}+\left(135-130\right)^3\right]\)
\(\left[36\cdot4-4\left(82-7\cdot11\right)^2:4\right]-2016\)
Thực hiện phép tính( tính nhanh nếu có thể):
a/ 26 + 173 + 74 + 27
b/ 75.37 + 89.46 + 75.52 - 89.21
c/ \(2^7:2^2+5^4:5^3.2^4-3.2^5\)
d/ \(100:\left\{250:\left[450-\left(4.5^3-2^2.25\right)\right]\right\}\)
\(\left(1-\frac{2}{2.3}\right)\left(1-\frac{2}{3.4}\right)\left(1-\frac{2}{4.5}\right)...\left(1-\frac{2}{99.100}\right)=?\)
tính
b=\(\left(\frac{2}{2.3}-1\right).\left(\frac{2}{3.4}-1\right).\left(\frac{2}{4.5}-1\right).....\left(\frac{2}{2008.2009}-1\right)\)
\(A=\left(1-\frac{1}{2}\right)+\left(1-\frac{1}{4}\right)+\left(1-\frac{1}{8}\right)+...+\left(1-\frac{1}{1024}\right)\)
\(B=4.5^{100}.\left(\frac{1}{5}+\frac{1}{5^2}+\frac{1}{5^3}+...+\frac{1}{5^{100}}\right)+1\)
Bài 1 : Tính : \(100:\left\{250:\left[450-\left(4.5^2-2^2.25\right)\right]\right\}\)
Tính :\(\frac{1+\left(1+2\right)+\left(1+2+3\right)+...+\left(1+2+3+...+98\right)}{1.2+2.3+3.4+4.5+...+98.99}\)