Question

Oblicz:

2/9+(-1/3)=

4 2/3 - 7 3/5=

(-9 5/7) - 3,5=

Answer 1

2/9+(-1/3)= = 2/9 + (-3/9) = -(3/9 - 2/9) = - 1/9

 

4   2/3 - 7   3/5=4 i 10/15 + (-7 i 9/15) = -(7 i 9/15 - 4 i 10/15)  = -(6 i 24/15 - 4 i 10/15) = - 2 i 14/15

 

(-9   5/7) - 3,5= (-9 i 5/7) + (-3 i 1/2) = (-9 i 10/14) + (-3 i 7/14) = (-12 i 17/14) = (-13 i 3/14)