1+(1.26:1.2-1.5)×(-1,1/9):(-0.26)
1+(1.26:1.2-1.5)*(-1,1/9):(-0.26) 1+(1.05-1.5)*(-1/9):(-0.26) 1+(-0.45)*(-1/9):(-0.26) 1-45/100*1/9:26/100 1-5/100*100/26 1-1/20*100/26 1-5/26 26-5/26 21/26