36+79=115, 15÷0.1=150, 9.1-1.9=7.2, 7.2÷0.6=12,
0.25×8=2, [4/5]÷[2/3]=[6/5], [1/4]-[1/5]=[1/20], [8/9]×[3/4]=[2/3],
0.25×4×1.2=1.2, [1/2]+[5/7]=[17/14], 0.52=0.25, 0.74×0.6+0.74×0.4=0.74.故答案为:115,150,7.2,12,2,[6/5],[1/20],[2/3],1.2,[17/14],0.25,0.74.