1.35:2.7+6.02-5.9+0.4:2.5x(4.2-0.075)=

а расписать

вот

1. (4.2-0.75)=4.1252. 1.35/2.7=0.543. 0.4/2.5=0.164. 0.16*4.125=0.665. 6.02-5.9=0.126. 0.54+0.12=0.667. 0.66+0.66=1.32