\(\frac{-7}{25}.\frac{11}{13}+\frac{-7}{25}.\frac{2}{13}-\frac{18}{25}\)

= \(\frac{-7}{25}.\left(\frac{11}{13}+\frac{2}{13}\right)-\frac{18}{25}\)

= \(\frac{-7}{25}-\frac{18}{25}\)

= - 1

a, 440 + 2 . (125 - x) = 546

2 . (125 - x) = 546 - 440

2 . (125 - x) = 106

125 - x = 106 : 2

125 - x = 53

x = 125 - 53

x = 72

Các câu kia tương tự

Chúc bạn học tốt

còn câu e làm sao?

theo de bai va = 25.32+(-3)+3=775+(-3)+3=775

Ta có ; \(\frac{-7}{25}.\frac{11}{13}+\frac{-7}{25}.\frac{2}{13}-\frac{18}{25}\)

\(=\frac{-7}{25}.\left(\frac{11}{13}+\frac{2}{13}\right)-\frac{18}{25}\)

\(=\frac{-7}{25}.1-\frac{18}{25}\)

\(=\frac{-7}{25}-\frac{18}{25}=\frac{-25}{25}=-1\)

mk ko ghi lại đầu bài nhé

=-7/25.(11/13+2/13)-18/25

=-7/25.1-18/25

=-7/25-18/25

=-25/25

=-1  

~ chúc bạn học toots~ k mk nha

Thanks mina-san nhiều ~!♥ Arigatou gozaimatsu~

a) \(25.2^2+\left(15-18\right)+\left(12-19+10\right)\)

\(=25.4+\left(-3\right)+3\)

\(=100+0\)

\(=100\)

= 25 . 4 + (-3) + (-7 + 10)

= 100 + (-3) + 3

= 100 + [(-3) + 3 )

= 100 + 0 = 100

Hok tốt ^_^ !

Trả lời:

\(25.2^2+\left(15-18\right)+\left(12-19+10\right)\)

\(=25.4+15-18+12-19+10\)

\(=100+15-18+12-19+10\)

\(=100\)

Hok tốt!

Vuong Dong Yet

a,   =231

b,   x=10

      x=3 hoặc -3

1: \(78+22+18\)

\(=\left(78+22\right)+18\)

=100+18

=118

2: \(94+563+\left(106-563\right)-\left(-70\right)\)

\(=94+563+106-563+70\)

\(=\left(94+106\right)-\left(563-563\right)+70\)

=100-0+70

=170

3: \(25\cdot154-25+47\cdot25\)

\(=25\left(154-1+47\right)\)

\(=25\cdot200=5000\)

4: \(\left[5^{29}+5^{30}\left(16-11\right)\right]:5^{29}\)

\(=\left(5^{29}+5^{30}\cdot5\right):5^{29}\)

\(=\dfrac{5^{29}\cdot1+5^{29}\cdot5^2}{5^{29}}\)

\(=1+5^2=26\)

8: \(25\cdot2^3-\left(9-14\right)+\left(29-34+20\right)\)

\(=25\cdot8-\left(-5\right)+\left(-5\right)+20\)

\(=200+5-5+20\)

=220