Question

250m +? m =1km cum se rezolva aceasta

Answer 1

$1 \ km=1000 \ m \\ 250 \ m+ ? \ m=1 \ km=1000 \ m \\ \Rightarrow ? \ m=1 \ km-250 \ m=1000 \ m-250 \ m \\ \Rightarrow 1000 \ m-250 \ m=\boxed{750 \ m}.$

Answer 2

250m+x=1km
⇒1km=1000m;
⇒250m+x=1000m
⇒x=1000m-250m
⇒x=750m;