a) 13ml+20cl-2dl =....ml
13ml+200ml-200ml=13ml
b) 27l-150dl+3dal =......l
27l-15l+30l=12l+30l=42l
c) 2400cl+130l-1dal=.....l
24l+130l-10l=154l-10l= 144l
d) 1kl-1hl+90dal = ....hl
10hl-1hl+9hl=9hl+9hl=18hl
e) 3,5hl+360l-7100dl=...dal
35dal+36dal-71dal=71 dal-71dal=0 dal
f) 9,52dal-13l+780cl=...dl
952dl-130dl+78dl=822 dl+78dl=900 dl