500km+300dam+10000dm-70000mm=....m

500 km. = 500.000 m
300 dam = 3.000 m
10.000 dm = 1000 m
70.000 mm = 70 m

500.000+3.000+1.000-70 = 530.930 m

500 km = 500 × 1000 = 500000 m
300 dam = 300 × 10 = 3000 m
10000 dm = 10000 ÷ 10 = 1000 m
70000 mm = 70000 ÷ 1000 = 70 m
hasil :
500000 m + 3000 m + 1000 m - 70 m = 503930

Semoga Bermanfaat...^^