Math

1.   I had 10 metres of material. I want to cut 30 centimetres. How much will be left? 9.70m=970cm


2.   Vaiola has to travel a distance of 20km. She travels 15km on a
train and 3.5km on a bus. She walks the rest of the way. How
far does she have to walk?1.5km=1500m


3. Lata wants to make 12 cakes. If I know that 6kg of flour is enough
for 36 cakes, how much flour will I need?2kg