1) 3,5 km + 2hm = .....m 2) 1500 cm² - 14 dm²=.......mm²

1.3,5 km + 2 hm = .....m
3500 m + 200 m = 3700 m

2.1500 cm²-14dm² =....mm²
150000 mm² -140000 mm² =10000 mm²

1. 3,5km+2hm= m
=(3,5x1000)+(2x100)
=3500+200=3700m
2.1500cm²-14dm²= mm²
=(1500x100)-(14x10000)
=150000-140000
=10000mm²
semoga bener ya