=-3/31-6/17+1/25-28/31-11/17-1/5

=-1-1-4/25=-2-4/25=-54/25

=\(-\dfrac{54}{25}\)

\(=\left[\left(-\dfrac{3}{31}\right)+\left(-\dfrac{28}{31}\right)\right]+\left[\left(-\dfrac{6}{17}\right)+\left(-\dfrac{11}{17}\right)\right]+\left[\dfrac{1}{25}+\left(-\dfrac{1}{5}\right)\right]\)

\(=\left(-1\right)+\left(-1\right)+\left[\dfrac{1}{25}+\left(-\dfrac{5}{25}\right)\right]\)

\(=\left(-1\right)+\left(-1\right)+\left(-\dfrac{4}{25}\right)\)

\(=\left(-2\right)+\left(-\dfrac{4}{25}\right)\)

\(=\left(-\dfrac{50}{25}\right)+\left(-\dfrac{4}{25}\right)\)

\(=-\dfrac{54}{25}\)

\(=\left(\dfrac{-3}{31}+\dfrac{-28}{31}\right)+\left(\dfrac{-6}{17}+\dfrac{-11}{17}\right)+\left(\dfrac{1}{25}+\dfrac{1}{5}\right)\)

\(=-1+-1+\left(\dfrac{1}{25}+\dfrac{-5}{25}\right)\)

\(=-2\)\(+\dfrac{-4}{25}\)

\(=\)\(\dfrac{50}{25}+\dfrac{-4}{25}\)

=\(\dfrac{46}{25}\)

A = - \(\dfrac{3}{31}\)  - \(\dfrac{6}{17}\) + \(\dfrac{1}{2}\) - \(\dfrac{28}{31}\) - \(\dfrac{11}{17}\)- \(\dfrac{1}{6}\)

A = -( \(\dfrac{3}{31}\) + \(\dfrac{28}{31}\)) - ( \(\dfrac{6}{17}\) + \(\dfrac{11}{17}\)) +( \(\dfrac{1}{2}\)- \(\dfrac{1}{6}\))

A = - \(\dfrac{31}{31}\) - \(\dfrac{17}{17}\)+ \(\dfrac{1}{3}\)

A = -1 - 1 + \(\dfrac{1}{3}\)

A = \(-\dfrac{5}{3}\)

b: D=(-3/31-28/31)+(-6/17-11/17)+(1/25-5/25)

=-2-4/25=-54/25

Giúp tớ với tớ cần gấp

a: \(=\dfrac{-5}{7}-\dfrac{2}{7}+\dfrac{3}{4}+\dfrac{1}{4}-\dfrac{1}{5}=-\dfrac{1}{5}\)

b: \(=\dfrac{-3}{31}-\dfrac{28}{31}+\dfrac{-6}{17}-\dfrac{11}{17}+\dfrac{1}{29}-\dfrac{1}{5}=\dfrac{-24}{145}\)

1,35326087

-2/3

0

-6/29/44

-9

nha bạn

lớp 1 mà cậu

4.24.5²-(3³.18+3³.12)

=4.24.25-[27.(18+12)]

=(4.25).24-[27.30]

=100.24-810

=2400-810

=1590

4.24.5^2-(3^3.18+3^3.12)

31.15.7^2.4-31.49.40

1+2+3+4+5+6+7+8+9+10

1+3+5+7+9+11+13+15+19

2+6+10+14+22+23+26+34

5+8+11+14+17+20+23+26+29

1+6+11+16+21+26+31+36+41+47+51

10+13+16+19+22+25+28+31+34+37+40

5+7+9+11+13+15+17+3+8+13+18+23+28

4+7+10+13+16+19+5+9+13+17+21+25 = 1590

#HT#

âm 2( số -2) và 4/25

\(\frac{-3}{31}+\frac{-6}{17}+\frac{1}{25}+\frac{-28}{31}+\frac{-11}{17}+\frac{-1}{5}\)

\(=\left(\frac{-3}{31}+\frac{-28}{31}\right)+\left(\frac{-6}{17}+\frac{-11}{17}\right)+\left(\frac{1}{25}+\frac{-1}{5}\right)\)

\(=\frac{-31}{31}+\frac{-17}{17}+\frac{-4}{25}\)

\(=\left(-1\right)+\left(-1\right)+\frac{-4}{25}\)

\(=\frac{\left(-25\right)+\left(-25\right)+\left(-4\right)}{25}\)

\(=\frac{-54}{25}\)

(-3/31+-28/31)+(6/17+11/17)+1/25+-1/5

-1+-1+1/25 +-1/5

-2+1/25+-1/5

-2/1+1/25+-1/5

-50/25+1/25+-5/25

-49/25+-5/25

-54/25

mik đúng mn k  cho mik nha cảm ơn mn