Question

Can some one help me with these two and tell me if it's multiplication or division please

Answer 1

it is unit conversion

1 hm = 100 m

6 hm * 100m/1 hm = 600 m

3m + 600 m

603 m

1 dekameter = 10 meters

9 dam * 10m/1dam = 90 m

5 m + 90 m

95 meters