Bài 1:Tính giá trị biểu thức
_{1,}3^2.dfrac{1}{243}.81^2.dfrac{1}{3^3}
_{2,}(4.2^5):left(2^3.dfrac{1}{16}right)
_{3,}left(2^{-1}+3^{-1}right)+left(2^{-1}.2^0right):2^3
_{4,}left(-dfrac{1}{3}right)^{-1}-left(-dfrac{6}{7}right)^0+left(dfrac{1}{2}right)^2:2
_{5,}[(0,1)^2]^0+[(dfrac{1}{7})^{-1}]^2.dfrac{1}{49}.left[left(2^2right)^3:2^5right]
Bài 2:Rút gọn biểu thức
a,dfrac{4^5.9^4-2.6^9}{2^{10}.3^8+6^8.20}
b,dfrac{3^6.45^4-15^{13}.5^{-9}}{27^4.25^3+45^6}
c,left(dfrac{2}{5}right)^7.5^7+left(...
Đọc tiếp
Bài 1:Tính giá trị biểu thức
\(_{1,}\)\(3^2.\dfrac{1}{243}.81^2.\dfrac{1}{3^3}\)
\(_{2,}\)(\(4.2^5\)):\(\left(2^3.\dfrac{1}{16}\right)\)
\(_{3,}\)\(\left(2^{-1}+3^{-1}\right)+\left(2^{-1}.2^0\right):2^3\)
\(_{4,}\)\(\left(-\dfrac{1}{3}\right)^{-1}-\left(-\dfrac{6}{7}\right)^0+\left(\dfrac{1}{2}\right)^2:2\)
\(_{5,}\)[(0,1)\(^2\)]\(^0\)+[(\(\dfrac{1}{7}\))\(^{-1}\)]\(^2\).\(\dfrac{1}{49}.\left[\left(2^2\right)^3:2^5\right]\)
Bài 2:Rút gọn biểu thức
a,\(\dfrac{4^5.9^4-2.6^9}{2^{10}.3^8+6^8.20}\)
b,\(\dfrac{3^6.45^4-15^{13}.5^{-9}}{27^4.25^3+45^6}\)
c,\(\left(\dfrac{2}{5}\right)^7.5^7+\left(\dfrac{9}{4}\right)^3:\left(\dfrac{3}{16}\right)^3\)
\(\overline{2^7.5^2+512}\)
d,\(\left(\dfrac{2}{3}\right)^3.\left(-\dfrac{3}{4}\right)^2.\left(-1\right)^5\)
\(\overline{\left(\dfrac{2}{5}\right)^2}.\left(-\dfrac{5}{12}\right)^3\)
