Question

1) oblicz

A) 2 6/7 * ( -14/15) - 3 1/3 *(-1 4/5) =

B) - 5 1/3 *(-1 1/2) + 5/8 : (- 3 3/4 )=

C) -6 1/2 : 5 1/5 + 2 1/4 : ( - 1 1/5) =

D)3,4-3,6:0,9-12*(-0,5) =

prosze o pomc Oczywiscier dam naj ; *

Answer 1

A) 2 6/7 * ( -14/15) - 3 1/3 *(-1 4/5) = 20/7 * ( -14/15)  - 10/3 *(-9/5) =

-40/15 + 30/5 = -8/3 + 6 = -2 i 2/3 + 6 = 3 i 1/3

B) - 5 1/3 *(-1 1/2) + 5/8 : (- 3 3/4 )= (-16/3) * (-3/2) + 5/8 : (-15/4) = 8

+ 5/8 * (-4/15) = 8  + (-1/6) = 7 i 5/6

C) -6 1/2 : 5 1/5 + 2 1/4 : ( - 1 1/5) = (-13/2 ) : 26/5  +9/4 : ( - 1 1/5) =

(-13/2 ) * 5/26 +9/4 * (-5/11) = (-5/4) + (-45/44) = (-55/44) + (-45/44) = -100/44 = -2 i 12/44 = -2 i 6/22 = -2 i 3/11

D)3,4-3,6:0,9-12*(-0,5) = 3,4-  4 + 6 = 5,4