\(\dfrac{2^{11}.9^2}{3^5.16^2}\)
= \(\dfrac{2^{11}.3^4}{3^5.2^8}\)
= \(\dfrac{2^3}{3}\)= \(\dfrac{8}{3}\)= 2, (6)
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Các câu hỏi tương tự
a, \(\dfrac{2}{3}-\dfrac{2}{5}+\dfrac{2}{9}+\dfrac{2}{13}\)/\(\dfrac{11}{3}-\dfrac{11}{5}+\dfrac{9}{11}+\dfrac{11}{3}\)
thực hiện phép tính (tính hợp lí nếu có thể)
1) -0,75.dfrac{12}{-5}.4dfrac{1}{6}.left(-1right)^2
2) dfrac{11}{25}.left(-24,8right)-dfrac{11}{25}.75,2
3) left(-dfrac{3}{4}+dfrac{2}{7}right):dfrac{2}{3}+left(-dfrac{1}{4}+dfrac{5}{7}right):dfrac{2}{3}
4) left(dfrac{1}{2}-dfrac{2}{3}right)-left(dfrac{5}{3}-dfrac{3}{2}right)+left(dfrac{7}{3}-dfrac{5}{2}right)
5) left(-2right)^2+sqrt{36}-sqrt{9}+sqrt{25}
6) left(-dfrac{1}{3}right)^2.dfrac{4}{11}+dfrac{7}{11}.left(-dfrac{1}{3}right)^2
Đọc tiếp
thực hiện phép tính (tính hợp lí nếu có thể)
1) \(-0,75.\dfrac{12}{-5}.4\dfrac{1}{6}.\left(-1\right)^2\)
2) \(\dfrac{11}{25}.\left(-24,8\right)-\dfrac{11}{25}.75,2\)
3) \(\left(-\dfrac{3}{4}+\dfrac{2}{7}\right):\dfrac{2}{3}+\left(-\dfrac{1}{4}+\dfrac{5}{7}\right):\dfrac{2}{3}\)
4) \(\left(\dfrac{1}{2}-\dfrac{2}{3}\right)-\left(\dfrac{5}{3}-\dfrac{3}{2}\right)+\left(\dfrac{7}{3}-\dfrac{5}{2}\right)\)
5) \(\left(-2\right)^2+\sqrt{36}-\sqrt{9}+\sqrt{25}\)
6) \(\left(-\dfrac{1}{3}\right)^2.\dfrac{4}{11}+\dfrac{7}{11}.\left(-\dfrac{1}{3}\right)^2\)
\(\dfrac{x+4}{8}+\dfrac{x+3}{9}=\dfrac{x+2}{10}+\dfrac{x+1}{11}\)
thực hiện phép tính (tính hợp lí nếu có thể)
1) left(-dfrac{1}{2}right)^2:dfrac{1}{4}-2.left(dfrac{-1}{2}right)^3+sqrt{4}
2) 3-left(dfrac{-6}{7}right)^0+sqrt{9}:2
3) left(-2right)^3+dfrac{1}{2}:dfrac{1}{8}-sqrt{25}+left|-64right|
4) left(-dfrac{1}{2}right)^4+left|-dfrac{2}{3}right|-2007^0
5) dfrac{left(0,4-dfrac{2}{9}+dfrac{2}{11}right)}{1,4-dfrac{7}{9}+dfrac{7}{11}}-dfrac{dfrac{1}{3}-0,25+dfrac{1}{5}}{1dfrac{1}{6}-0,875+0,7}
6) left[2^3.left(-dfrac{1}{2}right)^3+dfrac{1}{2}right]+left[dfr...
Đọc tiếp
thực hiện phép tính (tính hợp lí nếu có thể)
1) \(\left(-\dfrac{1}{2}\right)^2:\dfrac{1}{4}-2.\left(\dfrac{-1}{2}\right)^3+\sqrt{4}\)
2) \(3-\left(\dfrac{-6}{7}\right)^0+\sqrt{9}:2\)
3) \(\left(-2\right)^3+\dfrac{1}{2}:\dfrac{1}{8}-\sqrt{25}+\left|-64\right|\)
4) \(\left(-\dfrac{1}{2}\right)^4+\left|-\dfrac{2}{3}\right|-2007^0\)
5) \(\dfrac{\left(0,4-\dfrac{2}{9}+\dfrac{2}{11}\right)}{1,4-\dfrac{7}{9}+\dfrac{7}{11}}-\dfrac{\dfrac{1}{3}-0,25+\dfrac{1}{5}}{1\dfrac{1}{6}-0,875+0,7}\)
6) \(\left[2^3.\left(-\dfrac{1}{2}\right)^3+\dfrac{1}{2}\right]+\left[\dfrac{25}{22}+\dfrac{6}{25}-\dfrac{3}{22}+\dfrac{19}{25}+\dfrac{1}{2}\right]\)
Thuc hien phep tinh;
a/ 1dfrac{4}{23}+dfrac{5}{21}-dfrac{4}{23}+0,5+dfrac{16}{21}
b/ left(dfrac{1}{25}+dfrac{1}{5}+1right):left(dfrac{1}{25}-dfrac{1}{5}-1right)
c/ dfrac{dfrac{1}{9}-dfrac{1}{7}-dfrac{1}{11}}{dfrac{4}{9}-dfrac{4}{7}-dfrac{4}{11}}+ dfrac{0,6-dfrac{3}{25}-dfrac{3}{125}-dfrac{3}{625}}{dfrac{4}{5}-0,16-dfrac{4}{125}-dfrac{4}{625}}
d/ dfrac{2^{12}.3^5-4^6.9^2}{left(2^2.3right)^6+8^4.3^5}-dfrac{5^{10}.7^3-25^5.49^2}{left(125.7right)^3+5^9.14^3}
Đọc tiếp
Thuc hien phep tinh;
a/ \(1\dfrac{4}{23}+\dfrac{5}{21}-\dfrac{4}{23}+0,5+\dfrac{16}{21}\)
b/ \(\left(\dfrac{1}{25}+\dfrac{1}{5}+1\right):\left(\dfrac{1}{25}-\dfrac{1}{5}-1\right)\)
c/ \(\dfrac{\dfrac{1}{9}-\dfrac{1}{7}-\dfrac{1}{11}}{\dfrac{4}{9}-\dfrac{4}{7}-\dfrac{4}{11}}\)+ \(\dfrac{0,6-\dfrac{3}{25}-\dfrac{3}{125}-\dfrac{3}{625}}{\dfrac{4}{5}-0,16-\dfrac{4}{125}-\dfrac{4}{625}}\)
d/ \(\dfrac{2^{12}.3^5-4^6.9^2}{\left(2^2.3\right)^6+8^4.3^5}-\dfrac{5^{10}.7^3-25^5.49^2}{\left(125.7\right)^3+5^9.14^3}\)
a)dfrac{5}{15}+dfrac{14}{25}-dfrac{12}{9}+dfrac{2}{7}+dfrac{11}{25}
b)left(dfrac{3}{7}-dfrac{5}{2}-dfrac{3}{5}right)-left(-dfrac{4}{7}-dfrac{3}{2}+dfrac{2}{5}right)
c)left(dfrac{2}{5}right)^2+5dfrac{1}{2}.left(4,5-2right)+dfrac{2^3}{left(-4right)}
d)left(-dfrac{1}{2}right)^2:dfrac{1}{4}-2.left(-dfrac{1}{2}right)^3
e)sqrt{16}.1dfrac{3}{4}+dfrac{1}{4}-7
f)dfrac{2^9.4^{10}}{8^8}
Đọc tiếp
a)\(\dfrac{5}{15}+\dfrac{14}{25}-\dfrac{12}{9}+\dfrac{2}{7}+\dfrac{11}{25}\)
b)\(\left(\dfrac{3}{7}-\dfrac{5}{2}-\dfrac{3}{5}\right)-\left(-\dfrac{4}{7}-\dfrac{3}{2}+\dfrac{2}{5}\right)\)
c)\(\left(\dfrac{2}{5}\right)^2+5\dfrac{1}{2}.\left(4,5-2\right)+\dfrac{2^3}{\left(-4\right)}\)
d)\(\left(-\dfrac{1}{2}\right)^2:\dfrac{1}{4}-2.\left(-\dfrac{1}{2}\right)^3\)
e)\(\sqrt{16}.1\dfrac{3}{4}+\dfrac{1}{4}-7\)
f)\(\dfrac{2^9.4^{10}}{8^8}\)
Chứng minh rằng:
B=\(\dfrac{3^2}{20.23}+\dfrac{3^2}{23.26}+\dfrac{3^2}{26.29}+...+\dfrac{3^2}{77.80}>\dfrac{1}{9}\)
Tính
A ) (\(\dfrac{1}{3}\))2 . 9 . 3 -\(\dfrac{1}{2}\)
B) \(\dfrac{1}{4}\)+\(\dfrac{3}{4}\) . \(\dfrac{2}{5}\)
Bài 2 khó hơn nè : Thực hiện phép tính:
a, \(\dfrac{3}{5}+\dfrac{2}{7}
\)
b , \(\dfrac{-4}{3}:\dfrac{2}{15}\)
c, \(\dfrac{3}{7}.\dfrac{2}{9}+\dfrac{7}{9}.\dfrac{3}{7}\)
d, \(\left(\dfrac{-2}{3}\right)^3.9^2+\left(\dfrac{-3}{4}\right)^2.32\)