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= 5/3 * (-6/7) = - 30/21 = -1 9/21 = -1 3/7
b) -7 - (-5 2/7) = - 6 7/7 + 5 2/7 = -1 5/7
c) -4,6 + (-1 3/5) = -4,6 - 1,6 = - 6,2
d)
0,3 + 2/3
-------------- =
5/10 - 0,2
3/10 + 2/3
---------------- =
5/10 - 2/10
9/30 + 20/30
------------------- =
3/10
29/30
---------- = 29/30 : 3/10 = 29/30 * 10/3 = 290/90 = 3 20/90 = 3 2/9
3/10
=5/3*(-6/7) skróć 3 i 6 przez 3 =-10/7=-1 i 3/7
b)-7-(-5 i 2/7)=-7+37/7=-49/7+37/7=-12/7=-1 i 5/7
c)-4,6+(-1 i 3/5)=-46/10-8/5=-46/10-16/10=-62/10=-6 i 2/10=-6 1/5
d)0,3+2/3 3/10+2/3 9/30+20/30 29/30
--------------- = ---------------- = ----------------- = ---------- =29/30:3/10=
5/10-0,2 5/10-2/10 3/10 3/10
=29/30*10/3 (skróć 10 i 30 przez 10) =29/9=3 i 2/9