2/3 = 2 x 4/ 3 x 4 =8/12

8/14 = 8 : 2/ 14 : 2 =4/7

5/9 = 5 x3/ 9 x 3 =15/37

35/ 40 = 35 : 5/ 40 : 5=7/8

1) 35 x 1001 - 35 = 35 x 1001 - 35 x 1

= 35 x (1001 - 1)

=35 x 1000

= 35 000

2) 140 x 14 x 5 - 14 x 3

= 14 x ( 140 x 5 - 3)

= 14 x 679

=9758

1) 35 x 1001 - 35

=  35 x (1001-1)

=  35 x 1000

=  35000

2) 140 x 14 x 5 - 14 x 3

=  (140 x 5) x 14 - 14 x 3

=   700 x 14 - 14 x 3

=    14 x (700-3)

=     9758

Ai k mik mik k lại

a ) 35 000

b ) 9758

a = 302 / 105

b = 98/9

c= 6/5

tick nha

a=302/105

b 98 /9

c6/5

k nha và học tốt

a; \(\dfrac{9}{4}\) - \(\dfrac{-11}{4}\)

= \(\dfrac{9}{4}\) + \(\dfrac{11}{4}\)

= \(\dfrac{20}{4}\)

= 5 

b; \(\dfrac{7}{8}\) - \(\dfrac{3}{-8}\) - \(\dfrac{1}{8}\)

=  \(\dfrac{7}{8}\) + \(\dfrac{3}{8}\) - \(\dfrac{1}{8}\)

= \(\dfrac{7+3-1}{8}\)

= \(\dfrac{9}{8}\) 

c; \(\dfrac{-5}{21}\) - \(\dfrac{25}{21}\) - \(\dfrac{-1}{21}\)

  = \(\dfrac{-5}{21}\) - \(\dfrac{25}{21}\) + \(\dfrac{1}{21}\)

 =  \(\dfrac{-5-25+1}{21}\)

= \(\dfrac{-29}{21}\)

a) \(35\left(14-101\right)-14\left(35-10\right)\)

\(=35\cdot14-35\cdot101-14\cdot35+14\cdot10\)

\(=140-3535=-3395\)

b) \(5^2\cdot\left(-3\right)^3=25\cdot\left(-27\right)=-675\)

a,  35. ( 14 - 101 ) -  14 . ( 35 - 10 )
= 35 . 14 - 35 . 101 - 14 . 35 + 14 . 10

= 35 . 14 . ( - 35 . 101 - 14 . 10 )

= 490 . ( - 3535 - 140) 

= 490 . ( - 35675 ) 

~~ Tự tính nốt nhé

b, \(5^2.\left(-3\right)^3=25.\left(-27\right)\)= - 675

@@ Học tốt

Sai đề k??

a)35.(14-101)-14.(35-10)

=35.14-35.101-14.35-14.10

=35.(14-101-14)-14.10

=35.(-101)-14.10

=-3535-140

=-3675

b)5².(-3)³=25.(-27)=-675

a)-112

b: =-30-15-21

=-66

\(\frac{3}{17}+\frac{-5}{13}+\frac{-18}{35}+\frac{14}{17}+\frac{17}{-35}+\frac{-8}{13}\)

\(=\frac{3}{17}+\frac{-5}{13}+\frac{-18}{35}+\frac{14}{17}+\frac{-17}{35}+\frac{-8}{13}\)

\(=\left(\frac{3}{17}+\frac{14}{17}\right)+\left(\frac{-5}{13}+\frac{-8}{13}\right)+\left(\frac{-18}{35}+\frac{-17}{35}\right)\)

\(=\frac{17}{17}+\frac{-13}{13}+\frac{-35}{35}\)

\(=1+\left(-1\right)+\left(-1\right)\)

\(=-1\)

\(\frac{3}{17}+\frac{-5}{13}+\frac{-18}{35}+\frac{14}{17}+\frac{17}{-35}+\frac{-8}{13}\)

= \(\frac{3}{17}+\frac{-5}{13}+\frac{-18}{35}+\frac{14}{17}+\frac{-17}{35}+\frac{-8}{13}\)

= \(\left(\frac{3}{17}+\frac{14}{17}\right)+\left(\frac{-5}{13}+\frac{-8}{13}\right)+\frac{-18}{35}\)

= 1+(-1)+\(\frac{-18}{35}\)

= 0+\(\frac{-18}{35}\)

= \(\frac{-18}{35}\)

\(\frac{3}{17}-\frac{5}{13}-\frac{18}{35}+\frac{14}{17}-\frac{17}{35}-\frac{8}{13}=\left(\frac{3}{17}+\frac{14}{17}\right)-\left(\frac{5}{13}+\frac{8}{13}\right)-\left(\frac{18}{35}+\frac{17}{35}\right)\)

\(=1-1-1\)

=-1

\(-\frac{12}{35}\div\frac{7}{11}-\frac{23}{35}\div\frac{7}{11}-\frac{5}{11}\)

\(=\left(-\frac{12}{35}-\frac{23}{35}\right)\div\frac{7}{11}-\frac{5}{11}\)

\(=-1\div\frac{7}{11}-\frac{5}{11}\)

\(=-\frac{11}{7}-\frac{5}{11}\)

\(=-\frac{156}{77}\)

\(2-\frac{11}{9}\div\frac{5}{14}-\frac{7}{9}\times\frac{14}{5}\)

\(=2-\frac{154}{45}-\frac{98}{45}\)

\(=-\frac{64}{45}-\frac{98}{45}\)

\(=-\frac{18}{5}\)

[( 14 + 28 ) . 3 + 55 ] : 5 = 35

[    42   .    3   +   55 ] : 5 = 35

=      [ 126 + 55 ] : 5 = 35

=           181 : 5  = 35

=          36,2