\(\dfrac{\left(-0,25\right)^{-5}.9^4\left(-2\right)^{-3}-2^{-3}.6^9}{2^9.3^6+6^6.40}\)
Những câu hỏi liên quan
Tính giá trị các biểu thức sau (hợp lí nếu có thể):
a) \(\dfrac{8^5.\left(-5\right)^8+\left(-2\right)^5,10^9}{2^{16}.5^7+20^8}\)
b) \(\dfrac{\left(-0,25\right)^{-5}.9^4.\left(-2\right)^{-3}-2^{-2}.6^9}{2^9.3^6+6^6.40}\)
Tính giá trị biểu thức (hợp lí nếu có thể)
a) \(\frac{8^5.\left(-5\right)^8+\left(-2\right)^5.10^9}{2^{16}.5^7+20^8}\)
b)\(\frac{\left(-0,25\right)^{-5}.9^4.\left(-2\right)^{-3}-2^{-2}.6^9}{2^9.3^6+6^6.40}\)
a) \(\frac{8^5.\left(-5\right)^8+\left(-2\right)^5.10^9}{2^{16}.5^7+20^8}\)
\(=\frac{2^{15}.5^8+\left(-2\right)^5.10^9}{2^{16}.5^7+2.10^8}\)
\(=\frac{5-2^4.10}{2}\)
\(=5-8.10\)
\(=5-80\)
\(=-75\)
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Tính:
\(a.\frac{8^5.\left(-5\right)^8+\left(-2\right)^5.10^9}{2^{16}.5^7+20^8}\)
\(b.\frac{\left(-0,25\right)^{-5}.9^4.\left(-2\right)^{-3}-2^{-2}.6^9}{2^9.3^6+6^6.40}\)
\(c.\frac{2^{12}.3^5-4^6.9^2}{\left(2^2.3\right)^6+8^4.3^5}-\frac{5^{10}.7^3-25^5.49^2}{\left(125.7\right)^3+5^9.14^3}\)
22 tháng 9 2020 lúc 18:34
Rút gọn
1) \(\left(\frac{\left(\frac{-1}{4}\right)^{-1}.9^4.\left(-2\right)^{-3}-2^{-2}.6^9}{2^9.3^6+6^6.40}\right)\)
\(=\frac{-2^2.3^8.-\frac{1}{8}-\frac{1}{4}.\left(2.3\right)^9}{2^9.3^6+\left(2.3\right)^6.2^3.5}\)
\(=\frac{-2301}{2048}\)
\(\left(\dfrac{-9}{13}\right)\left(\dfrac{-4}{5}\right)\)
\(-0,7:\dfrac{3}{2}\)
\(\dfrac{7}{6}.3\dfrac{1}{4}+\dfrac{7}{6}.\left(-0,25\right)\)
a: \(=\dfrac{9}{13}\cdot\dfrac{4}{5}=\dfrac{36}{65}\)
b: \(=\dfrac{-7}{10}:\dfrac{3}{2}=\dfrac{-7}{10}\cdot\dfrac{2}{3}=\dfrac{-14}{30}=-\dfrac{7}{15}\)
c: \(=\dfrac{7}{6}\left(3+\dfrac{1}{4}-\dfrac{1}{4}\right)=\dfrac{7}{6}\cdot3=\dfrac{7}{2}\)
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tính
a |-5|.7^4+7^3.25/7^5.125-7^5.50
b (-0,25)^-5.9^4.(-2)^-3 - 2^-2.6^9/2^9.3^6 +6^6.40
tính
A( \(\dfrac{7}{8}-0,25\) ) \(:\left(\dfrac{5}{6}-0,75\right)^2\)
B) \(\dfrac{3}{4}.1\dfrac{4}{9}-\left(\dfrac{-3}{4}\right)\)
\(\text{A=}\left(\dfrac{7}{8}-0,25\right):\left(\dfrac{5}{6}-0,75\right)^2\)
\(A=\left(\dfrac{7}{8}-\dfrac{1}{4}\right):\left(\dfrac{5}{6}-\dfrac{3}{4}\right)^2\)
\(A=\left(\dfrac{7}{8}+\dfrac{-1}{4}\right):\dfrac{1}{144}\)
\(A=\dfrac{5}{8}.144=90\)
\(\text{B=}\dfrac{3}{4}.1\dfrac{4}{9}-\left(\dfrac{-3}{4}\right)\)
\(B=\dfrac{3}{4}.\dfrac{13}{9}+\dfrac{3}{4}\)
\(B=\dfrac{13}{12}+\dfrac{3}{4}\)
\(B=\dfrac{11}{6}\)
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3 tháng 10 2021 lúc 18:17
trả lời nhanh hộ mình cái đang gấp
(-0,25)^-5.9^4.(-2)^-3 - 2^-2.6^9/2^9.3^6 +6^6.40
\(\dfrac{\left(-0.25\right)^{-5}\cdot9^4\cdot\left(-2\right)^{-3}-2^{-2}\cdot6^9}{2^9\cdot3^6+6^6\cdot40}\)
\(=\dfrac{2^7\cdot3^8-2^8\cdot3^9}{2^9\cdot3^6+2^9\cdot3^6\cdot5}\)
\(=\dfrac{2^7\cdot3^8\cdot\left(-5\right)}{2^9\cdot3^6\cdot6}\)
\(=\dfrac{1}{4}\cdot9\cdot\dfrac{-5}{6}=\dfrac{-45}{24}=\dfrac{-15}{8}\)
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\(-2\dfrac{1}{5}.\left(\dfrac{-9}{11}\right).\left(-1\dfrac{1}{4}\right).\dfrac{2}{5}+\left(-6\right).\left(\dfrac{-1}{3}\right).0,25\)
tính
\(=\dfrac{-11}{5}\cdot\dfrac{-9}{11}\cdot\dfrac{-5}{4}\cdot\dfrac{2}{5}+2\cdot\dfrac{1}{4}\)
\(=\dfrac{-1}{2}+\dfrac{1}{2}=0\)
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