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-40*(-10/8)=50
b) -7-(-2 5/6) = 9 5/6 P/F
-7+17/6=-42/6+17/6=-25/6=-4 1/6
c) -2,2 * (-10/33) = 2/3 P/F
-22/10*(-10/33)=22/33=2/3
d) -9+(-3 3/7) = -12 3/7 P/F
-9-24/7=-63/7-24/7=-87/7=-12 3/7
F
F (chyba)
p
Mam nadzieje, że pomogłam :)