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a fost răspuns

Efectuati:(7supra8-1supra8)+1supra4;(5supra6+7supra6)-1supra7;(7supra3-4supra3)-12supra13;4supra3-(9supra11+2supra11;

Răspuns :

Needhelp112
a) (7/8-1/8)+1/4 = 6/8+1/4 = 3/4 + 1/4 = 4/4 = 1
b) (5/6+7/6)-1/7 = 12/6 - 1/7 = 2 - 1/7 = 14/7 - 1/7 = 13/7
c) (7/3-4/3)-12/13 = 3/3 - 12/13 = 1 -12/13 = 13/13-12/13 = 1/13
d) 4/3-(9/11+2/11) = 4/3-11/11 = 4/3-1 = 4/3-3/3 = 1/3

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