1/12+3/16+5/12+5/16
giúp mik đi mik tik cho
K
Khách
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28 tháng 8 2021
a: \(A=\dfrac{16^5\cdot15^5}{2^{10}\cdot3^5\cdot5^4}=\dfrac{2^{20}\cdot3^5\cdot5^5}{2^{10}\cdot3^5\cdot5^4}=2^{10}\cdot5=5120\)
b: \(B=\dfrac{2^{15}\cdot3+2^{19}\cdot10}{2^{12}\cdot26}=\dfrac{2^{15}\left(3+2^4\cdot10\right)}{2^{13}\cdot13}=2^2\cdot\dfrac{163}{13}=\dfrac{652}{13}\)
TT
3
22 tháng 2 2022
\(\dfrac{2}{5}+\dfrac{1}{3}=\dfrac{6+5}{15}=\dfrac{11}{15}\)
\(\dfrac{16}{24}+\dfrac{1}{3}=\dfrac{2}{3}+\dfrac{1}{3}=1\)
\(\dfrac{7}{12}+\dfrac{4}{6}+\dfrac{3}{8}=\dfrac{14}{24}+\dfrac{16}{24}+\dfrac{9}{24}=\dfrac{39}{24}=\dfrac{13}{8}\)
\(1+\dfrac{1}{12}=\dfrac{12+1}{12}=\dfrac{13}{12}\)
DA
10 tháng 6 2017
1 + 1 =2
2 + 2 =4
3 + 3 =6
4 + 4 =8
5 + 5 =10
6 + 6 =12
7 + 7 =14
8 + 8 =16
9 + 9 =18
10 + 10 =20
11 + 11 =22
12 + 12 =24
13 + 13 =26
14 + 14 =28
15 + 15 =30
16 + 16 =32
17 + 17 =34
18 + 18 =36
19 + 19 =38
20 + 20 = 40
k cho mik nha
NK
9 tháng 3 2023
\(a,-\dfrac{12}{16}-\left(\dfrac{3}{4}-x\right)=-\dfrac{5}{3}\)
\(\dfrac{3}{4}-x=-\dfrac{12}{16}-\left(-\dfrac{5}{3}\right)\)
\(\dfrac{3}{4}-x=\dfrac{11}{12}\)
\(x=\dfrac{3}{4}-\dfrac{11}{12}\)
\(x=-\dfrac{1}{6}\)
\(b,x-\dfrac{3}{7}:\dfrac{9}{14}=-\dfrac{7}{3}\)
\(x-\dfrac{3}{7}=-\dfrac{7}{3}\times\dfrac{9}{14}\)
\(x-\dfrac{3}{7}=-\dfrac{3}{2}\)
\(x=-\dfrac{3}{2}+\dfrac{3}{7}\)
\(x=-\dfrac{15}{14}\)
\(c,-\dfrac{3}{4}x+\dfrac{5}{8}x=\dfrac{1}{3}\)
\(\left(-\dfrac{3}{4}+\dfrac{5}{8}\right)x=\dfrac{1}{3}\)
\(-\dfrac{1}{8}x=\dfrac{1}{3}\)
\(x=\dfrac{1}{3}:\left(-\dfrac{1}{8}\right)\)
\(x=-\dfrac{8}{3}\)
V
So sánh các phân số sau.
a, 5/16 và -9/24 b, 5/6 và -1/2 c, -7/12 và 3/4
giúp mik với ạ mik cần gấp ạ 
3
5 tháng 3 2018
\(A=\frac{1\cdot2+2\cdot4+3\cdot6+4\cdot8+5\cdot10+6\cdot12}{3\cdot4+6\cdot8+9\cdot12+12\cdot16+15\cdot20+18\cdot24}\)
\(A=\frac{2\cdot3\left[1\cdot2\right]+2\cdot3\left[2\cdot4\right]+2\cdot3\left[3\cdot6\right]+2\cdot3\left[4\cdot8\right]+2\cdot3\left[5\cdot10\right]}{3\cdot4\left[3\cdot4+6\cdot8+9\cdot12+12\cdot16+15\cdot20\right]}\)
\(A=\frac{\left[3\cdot4+6\cdot8+9\cdot12+12\cdot16+15\cdot20\right]}{2\cdot3\left[3\cdot4+6\cdot8+9\cdot12+12\cdot16+15\cdot20\right]}=\frac{1}{2\cdot3}=\frac{1}{6}\)
PK
2
HV
28 tháng 8 2021
\(=\dfrac{2^{20}.3^5.5^5}{2^{10}.3^5.5^3}=2^{10}.5^2=1024.25=25600\)
tik pls
28 tháng 8 2021
\(\dfrac{16^5\cdot15^5}{2^{10}\cdot3^5\cdot5^3}=\dfrac{2^{20}\cdot3^5\cdot5^5}{2^{10}\cdot3^5\cdot5^3}=2^{10}\cdot5^2=1024\cdot25=25600\)
H
8 tháng 2 2023
`a, x/7 =-4/14`
`=> 14x=7.(-4)`
`=>14x=-28`
`=>x=-28:14`
`=>x=-2`
`b,x/2=-2/-x`
`=>x/2=2/x`
`=>x.x=2.2`
`=>x^2=4`
`=>x= +-2`
`c,(x-1)/5=5/(x-1)`
`=>(x-1)^2 = 5.5`
`=>(x-1)^2=25`
`=>(x-1)^2=5^2`
\(\Rightarrow\left[{}\begin{matrix}x-1=5\\x-1=-5\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=6\\x=-4\end{matrix}\right.\)
`d,x+3/2=-12/16`
`=>x=-12/16 -3/2`
`=>x= -12/16 - 24/16`
`=>x= -36/16`
`=>x=-9/4`
Trả lời:
\(\frac{1}{12}+\frac{3}{16}+\frac{5}{12}+\frac{5}{16}\)
\(=\left(\frac{1}{12}+\frac{5}{12}\right)+\left(\frac{3}{16}+\frac{5}{16}\right)\)
\(=\frac{6}{12}+\frac{8}{16}\)
\(=\frac{1}{2}+\frac{1}{2}\)
\(=\frac{2}{2}\)
\(=1\)
Kết quả của phép tính \(\frac{1}{12}+\frac{3}{16}+\frac{5}{12}+\frac{5}{16}\)là \(1\)
Chúc bn học tốt.
\(\frac{1}{12}+\frac{3}{16}+\frac{5}{12}+\frac{5}{16}=\frac{6}{12}+\frac{8}{16}=\frac{1}{2}+\frac{1}{2}=\frac{2}{2}=1\)