\(\frac{-23}{25}.\frac{10}{13}+\frac{-23}{25}.\frac{3}{13}+\frac{-27}{25}\)

= \(\frac{-23}{25}.\left(\frac{10}{13}+\frac{3}{13}\right)+\frac{-27}{25}\)

= \(\frac{-23}{25}.1+\frac{-27}{25}\)

= \(\frac{-23}{25}+\frac{-27}{25}\)

= \(\frac{-50}{25}\)

= \(-2\)

\(\frac{-23}{25}.\frac{10}{13}+\frac{-23}{25}.\frac{3}{13}+\frac{-27}{25}\)

\(=\frac{-23}{25}\left(\frac{10}{13}+\frac{3}{13}\right)+\frac{-27}{25}\)

\(=\frac{-23}{25}+\frac{-27}{25}=\frac{-50}{25}=-2\)

-23/25.10/13+-23/25.3/13+-27/25

= -23/25(10/13+3/13)+-27/25

= -23/25.1+-27/25

= -23/25+-27/25

= -2

B10:

a)23.27=621

b)-23.27=-621

c)23.(-23)=529

d)(-23).(-27)=621

=2480 nha

E = 4 + 42 + 4^3 + chấm chấm chấm + 4^n

E = 4 + 4² + 4^3 +...+ 4^n

23*75+25*10+25*13+180

= 69*25+25*10+25*13+180

=(69+10+13)25+180

=92*25+180

=2300+180

=2480

23 * 75 + 25 * 10 + 25 * 13 + 180

= 23 * 75 + 25 * ( 10 + 13 ) + 180

= 23 * 75 + 25 * 23 + 180

= 23 * ( 75 + 25 ) + 180

= 23 * 100 + 180

= 2300 + 180

= 2480

Ai rảnh mà làm hộ mày, ngu như con chó mới không biết làm

khó hiểu quá

mày bảo tao ngu mày cũng ngu thế thôi câm mồm đi

đéo làm đc cứ thích sĩ

23 . 75 + 25 . 10 + 25 . 13 + 180 = 23 . 75 + 25.(10+13) + 180

                                                = 23.75 + 25.23 + 180 = 23.(75 + 25) + 180

                                                = 23.100 + 180 = 2300 + 180 = 2480

23 x 75 + 25 x 10 + 25 x 13 + 180

= 23 x 75 + 25 x ( 10 + 13 ) + 180

= 23 x 75 + 23 x 25 + 180

= 23 x ( 75 + 25 ) + 180

= 23 x 100 + 180

= 2300 + 180

= 2480

~ HOK TỐT ~

\(23.75+25.10+25.13+180\)

\(=23.75+25\left(10+13\right)+180\)

\(=23.75+25.23+180\)

\(=23\left(75+25\right)+180\)

\(=23.100+180\)

\(=2300+180\)

\(=2480\)

a ) \(-\frac{13}{30}+\frac{11}{20}-\frac{7}{15}\)

\(=-\frac{26}{60}+\frac{33}{60}-\frac{28}{60}\)

\(=\frac{-26+33-28}{60}=-\frac{7}{20}\)

b ) \(-\frac{5}{72}:\left(\frac{3}{8}.\frac{7}{9}\right)\)

 \(=-\frac{5}{72}:\frac{3.7}{8.9}\)

\(=-\frac{5}{72}:\frac{7}{24}\)

\(=-\frac{5}{72}.\frac{24}{7}=-\frac{5}{21}\)

a) \(\frac{-13}{30}+\frac{11}{20}-\frac{7}{15}=\frac{-26}{60}+\frac{33}{60}-\frac{28}{60}=-\frac{21}{60}=-\frac{7}{20}\)

b) \(\frac{-5}{72}:\left(\frac{3}{8}.\frac{7}{9}\right)=\frac{-5}{72}:\frac{7}{24}=-\frac{5}{21}\)

c) \(\frac{-23}{25}.\frac{10}{13}+\frac{-23}{25}.\frac{3}{13}+\frac{-27}{25}\)

\(=\frac{-23}{25}.\left(\frac{10}{13}+\frac{3}{13}\right)+\frac{-27}{25}\)

\(=\frac{-23}{25}+\frac{-27}{25}\)

\(=\frac{-50}{25}=-2\)

Giải:

a) \(\left(-9\right)+10+\left(-10\right)+\left(-45\right)+55\)

\(=-9+10-10-45+55\)

\(=-9+\left(10-10\right)+\left(-45+55\right)\)

\(=-9+10=1\)

b) \(123+\left|-25\right|+\left(-\left|25\right|\right)-\left(-23\right)\)

\(=123+25+\left(-25\right)+23\)

\(=123+25-25+23\)

\(=123+\left(25-25\right)+23\)

\(=123+23=146\)

Chữ hơi xấu tí

⚽