Brp meterkah 2,5 km + 4 hm -300 dm?

2,5 km =2500 m
4 hm = 400 m
300 dm = 30 m

= ( 2500 + 400 – 30 ) m
= 2870 m

2,5 km = 2,5 × 1.000 m = 2.500 m
4 hm = 4 x 100 m = 400 m
300 dm = 300 ÷ 10 m = 30 m

= 2.500 m + 400 m – 30 m
= 2.870 m