Question

a) -2/5+(-5/9+2/5)

b) 17/13-(4/13-11)

c) 3/5*18/17+3/5*9/17-3/5*10/17

Answer 1

a) =-2,5+ -5,9+2/5

   = (-2/5+2/5)+-5/9

  = 0+-5/9

 =-5/9

b) 17/13 - 4/13 + 11

 = 1+11

 = 12

c) 3/5 x (18/17+9/17 - 10/17)

 = 3/5 x 1

 = 3,5

Answer 2

câu a 

ra =  - 5/9

câu b

ra = 12

câu c

ra = 3,5

tích mik nha nha nha

Answer 3

a) =-2,5+ -5,9+2/5

   = (-2/5+2/5)+-5/9

  = 0+-5/9

 =-5/9

b) 17/13 - 4/13 + 11

 = 1+11

 = 12

c) 3/5 x (18/17+9/17 - 10/17)

 = 3/5 x 1

 = 3,5

Answer 4

a) =-2,5+ -5,9+2/5

   = (-2/5+2/5)+-5/9

  = 0+-5/9

 =-5/9

b) 17/13 - 4/13 + 11

 = 1+11

 = 12

c) 3/5 x (18/17+9/17 - 10/17)

 = 3/5 x 1

 = 3,5

tích mik nha nha nha 

Answer 5

a) =-2,5+ -5,9+2/5

   = (-2/5+2/5)+-5/9

  = 0+-5/9

 =-5/9

b) 17/13 - 4/13 + 11

 = 1+11

 = 12

c) 3/5 x (18/17+9/17 - 10/17)

 = 3/5 x 1

 = 3,5

Answer 6

a) =-2,5+ -5,9+2/5

   = (-2/5+2/5)+-5/9

  = 0+-5/9

 =-5/9

b) 17/13 - 4/13 + 11

 = 1+11

 = 12

c) 3/5 x (18/17+9/17 - 10/17)

 = 3/5 x 1

 = 3,5

Answer 7

a) =-2,5+ -5,9+2/5

   = (-2/5+2/5)+-5/9

  = 0+-5/9

 =-5/9

b) 17/13 - 4/13 + 11

 = 1+11

 = 12

c) 3/5 x (18/17+9/17 - 10/17)

 = 3/5 x 1

 = 3,5

Answer 8

a) =-2,5+ -5,9+2/5

   = (-2/5+2/5)+-5/9

  = 0+-5/9

 =-5/9

b) 17/13 - 4/13 + 11

 = 1+11

 = 12

c) 3/5 x (18/17+9/17 - 10/17)

 = 3/5 x 1

 = 3,5

Answer 9

a) =-2,5+ -5,9+2/5

   = (-2/5+2/5)+-5/9

  = 0+-5/9

 =-5/9

b) 17/13 - 4/13 + 11

 = 1+11

 = 12

c) 3/5 x (18/17+9/17 - 10/17)

 = 3/5 x 1

 = 3,5