1)-11/12 x 1/8 11/12 x -3/16 - 11/12 2)-9/11 x 3/13 - 9/11 x 10/13 - 1 9/11 3)7/2 x 29/13 - 7/13 x 3/2 3,12 x 1/2 4)2 3/4

Question

1)-11/12 x 1/8 + 11/12 x -3/16 - 11/12 2)-9/11 x 3/13 - 9/11 x 10/13 - 1 9/11 3)7/2 x 29/13 - 7/13 x 3/2 + 3,12 x 1/2 4)2 3/4 - 1 3/5 x 2,75 -1,2 : 4/11   Cái mà 2 3/4 như thế này là hỗn số nhá

kimnguenoanh · Answer

1) -11/12 . 1/8+11/12 . (-3)/16-11/12   =  11/12 .(-1/8-3/16-1)   = 11/12 . (-21)/16   = -77/64   2) -9/11 . 3/13-9/11 . 10/13-1 9/11   = -9/11 . (3/13+10/13+1)-1   = -9/11 . 2-1   = -18/11-11/11   = -29/11   3) 7/2 . 29/13-7/13 . 3/2+3/12 . 1/2   = 7/2 . ( 29/13-3/13)+39/25   = 7/2 . 2+39/25   = 7+39/25   = 214/25   4) 2 3/4- 1 3/5 . 2,75-1/2 : 4/11   = 11/4-8/5 . 11/4 - 1/2 . 11/4   = 11/4  . (1-8/5-1/2)   = 11/4 . (-11)/10   = -121/40

1)-11/12 x 1/8 + 11/12 x -3/16 – 11/12 2)-9/11 x 3/13 – 9/11 x 10/13 – 1 9/11 3)7/2 x 29/13 – 7/13 x 3/2 + 3,12 x 1/2 4)2 3/4

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