`a, = (2^25 xx 5^25 xx 3^26)/(3^24 xx 5^24 xx 2^24)`
`= 2 xx 3^2 xx 5`
`= 90`
`b, = (10^3(5+2+1))/(10^3(10-1))`
`= 8/9`
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H24
27 tháng 9 2021 lúc 6:38
Bài 1 : Thực hiện phép tính a/ dfrac{7}{6} - dfrac{13}{12} + dfrac{3}{4}b/ 1 dfrac{1}{2} . dfrac{-4}{5} + dfrac{3}{10}c/ dfrac{25}{9} . dfrac{3}{10} + ( dfrac{-5}{3} )^2 . dfrac{7}{10} + | dfrac{-25}{3} | Bài 2 : Tìm x , biếta/ x - dfrac{5}{6} dfrac{1}{4}b/ dfrac{26}{x} dfrac{-13}{-15}( Cần gấp )
Đọc tiếp
Bài 1 : Thực hiện phép tính
a/ \(\dfrac{7}{6}\) - \(\dfrac{13}{12}\) + \(\dfrac{3}{4}\)
b/ 1 \(\dfrac{1}{2}\) . \(\dfrac{-4}{5}\) + \(\dfrac{3}{10}\)
c/ \(\dfrac{25}{9}\) . \(\dfrac{3}{10}\) + ( \(\dfrac{-5}{3}\) )\(^2\) . \(\dfrac{7}{10}\) + | \(\dfrac{-25}{3}\) |
Bài 2 : Tìm x , biết
a/ x - \(\dfrac{5}{6}\) = \(\dfrac{1}{4}\)
b/ \(\dfrac{26}{x}\) = \(\dfrac{-13}{-15}\)
( Cần gấp )
HV
21 tháng 7 2023 lúc 14:46
bài 6: tính :
\(\dfrac{10^9.\left(-81\right)^{10}}{\left(-8\right)^4.25^5.9^{10}}\)
b,\(\dfrac{9^4.\left(-4\right)^5.25^3}{8^3,\left(-27\right)^2.5^7}\)
c,\(\dfrac{3^{186}.\left(-25\right)^{50}}{\left(-15\right)^{100}.27^{29}}\)
Tính nhanh nếu có thể:
a) \(\dfrac{15}{12}+\dfrac{5}{13}-\dfrac{3}{12}-\dfrac{18}{13}\)
b) \(\dfrac{5^4.20^4}{25^5.4^5}\)
c) \(\dfrac{8^{10}+4^{10}}{8^4+4^{11}}\)
TL
28 tháng 9 2023 lúc 18:44
\(d,\dfrac{\left(13\dfrac{1}{4}-2\dfrac{5}{27}-10\dfrac{5}{6}\right).230\dfrac{1}{25}+46\dfrac{3}{4}}{\left(1\dfrac{3}{7}+\dfrac{10}{3}\right):\left(12\dfrac{1}{3}-14\dfrac{2}{7}\right)}\)
dfrac{8^{14}}{4^4.64^5}
dfrac{9^{10}.27^7}{81^7.3^{15}}
left(dfrac{3}{10}right)^4.left(0,3right)^5.left(dfrac{10}{3}right)^{10}
dfrac{left(4^3right)^2.9^4}{6^7.8^2}
dfrac{4^8.9^4}{6^6.8^3}
3^6.left(dfrac{1}{3}right)^6.81^2.dfrac{1}{27^2} TÍNH
Đọc tiếp
\(\dfrac{8^{14}}{4^4.64^5}\)
\(\dfrac{9^{10}.27^7}{81^7.3^{15}}\)
\(\left(\dfrac{3}{10}\right)^4.\left(0,3\right)^5.\left(\dfrac{10}{3}\right)^{10}\)
\(\dfrac{\left(4^3\right)^2.9^4}{6^7.8^2}\)
\(\dfrac{4^8.9^4}{6^6.8^3}\)
\(3^6.\left(\dfrac{1}{3}\right)^6.81^2.\dfrac{1}{27^2}\) TÍNH
Bài 1.Tính hợp lý
a) \(\text{(0,5)}^3\) .\(2^3\)
b) \(\text{(0,25)}^2\).16
c) \(\left(\dfrac{3}{5}\right)^3:\left(\dfrac{-27}{1000}\right)\)
d) \(\dfrac{4^2.25^2+32.125}{2^3.5^2}\)
e) \(\dfrac{4^5.21+4^5.19}{2^{10}.11+2^{10}.5}\)
Tính nhanh:A=1*5*6+2*10*12+3*15*18+4*20*24+5*25*30/1*3*5+2*6*10+3*9*15+4*12*20+5*15*25
a)\(\dfrac{\left(-3\right)^{10}.15^5}{25^3.\left(-9\right)^7}\)
b)\(\dfrac{4^{30}.3^{43}}{2^{57}.27^{15}}\)
H24
11 tháng 9 2023 lúc 18:58
Tìm số nguyên x, biết
a) \(-\dfrac{x}{2}+\dfrac{2x}{3}+\dfrac{x+1}{4}+\dfrac{2x+1}{6}=\dfrac{8}{3}\)
b) \(\dfrac{3}{2x+1}+\dfrac{10}{4x+2}-\dfrac{6}{6x+3}=\dfrac{12}{26}\)
\(\dfrac{3^{10}.11+9^5.5}{27^3.2^4}.x=-9\)