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Efectuati: (9/2-1/3)*6/10; (11/12-3/4):2/9; 5/28*(5/3-4/15); 4/29*(5/6+3/8)

Răspuns :

(9/2-1/3)*6/10=(27/6-2/6)*3/5=25/6*3/5=75/30=15/6=2,5
(11/12-3/4):2/9=(11/12-9/12)*9/2=2/12*9/2=9/12=3/4=0,75
5/28*(5/3-4/15)=5/28*(25/15-4/15)=5/28*21/15=105/420=0,25
4/29*(5/6+3/8)=4/29*(40/48+18/48)=4/29*58/48=58/348=0,1(6)