9,72 hay 243/25

= 8 832 600

 Bạn Nguyễn Huyền Diệu Hương ơi, đáp án cô giáo mình bảo ra 504

\(\dfrac{x-25-124}{2015}\) + \(\dfrac{x-124-2015}{25}\) + \(\dfrac{x-2015-25}{124}\) = 3

\(\dfrac{x-15-124}{2015}\) - 1 + \(\dfrac{x-124-2015}{25}\) - 1 + \(\dfrac{x-2015-25}{124}\) - 1 = 0

\(\dfrac{x-15-124-2015}{2015}\)+\(\dfrac{x-124-2015-25}{25}\)+\(\dfrac{x-2015-25-124}{124}\) = 0

\(\dfrac{x-\left(15+124+2015\right)}{2015}\)+\(\dfrac{x-\left(124+2015+25\right)}{25}\)+\(\dfrac{x-\left(2015+25+124\right)}{124}\) = 0

(\(x\) - 2164).(\(\dfrac{1}{2015}\)+\(\dfrac{1}{25}\)+\(\dfrac{1}{124}\)) = 0

\(x-2164\) = 0

\(x\)              = 2164

http://123link.pro/E5d79B

a)(33,76+6,24)+19,52

=40+19,52

=59,52

b)  (\(\frac{38}{11}\)+\(\frac{6}{11}\)) +\(\frac{13}{16}\)

=4+\(\frac{13}{16}\)

=\(\frac{77}{16}\)

0,08 m

0,25 tấn

3,215 kg

2/25m= 0,08 m

25/100 tân = 0,25 tân

3215/1000 kg = 3,215 kg nha bn

a) \(\frac{37}{25}+\frac{11}{21}-\frac{12}{25}+\frac{10}{21}\)

= \(\left(\frac{37}{25}-\frac{12}{25}\right)+\left(\frac{11}{21}+\frac{10}{21}\right)\)

= 1 + 1

= 2

\(\frac{37}{25}+\frac{11}{21}-\frac{12}{25}+\frac{10}{21}\)

=\(\left(\frac{37}{25}-\frac{12}{25}\right)+\left(\frac{11}{21}+\frac{11}{21}\right)\)

= 1 + 1 = 2 .

25% , 2,5 ,25

a)=384:(25*4)=384:100=3,84.

b)37/25:5/4:74/25=37/25*4/5*25/74=37*4*25/5*25*74=2/5.

c)380:(38*2)=(380:38):2=10:2=5.

d)6/11:4/3:5/11:4/3=6/11*3/4*11/5*3/4=6*3*11*3/11*4*5*4=27/40.

k nha

a,384:25:4

=15.36:4

=3.84

\(\frac{4\sqrt{7}-5}{20}\)

\(\left(x+\frac{1}{4}\right)^2+\frac{11}{25}=\frac{18}{25}\)

\(\Rightarrow\left(x+\frac{1}{4}\right)^2=\frac{7}{25}\)

\(\Rightarrow x+\frac{1}{4}=\hept{\begin{cases}\sqrt{\frac{7}{25}}\\-\sqrt{\frac{7}{25}}\end{cases}}\)

\(\Rightarrow x=\hept{\begin{cases}\sqrt{\frac{7}{25}}-\frac{1}{4}\\-\sqrt{\frac{7}{25}}-\frac{1}{4}\end{cases}}\)

\(\frac{12}{25}\)< \(\frac{25}{49}\)

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