Convert the Units

John rode 2 kilometers on his bike. His sister Sally rode 3000 meters on her bike. Who rode the farthest?

Jessica is measuring two line segments. The first line segment is 30 cm long. The second line segment is 500 mm long. How long (in cm) are the two line segments together?

Lois wants to send a box of oranges to a friend by mail. The box of oranges cannot exceed a mass of 10 kg. If each orange has a mass of 200g, what is the maximum number she can send?

Walt grew 10 centimeters in 1 year. He is now 1.6 m tall. How tall (in meter) was he 1 year ago?

Mr. Martin's Spanish class is 45 minutes long. If it starts at 3:30, what time does it end?

Sebastian studies from 3:15 - 4:45. His sister, Sasha studies from 4:30 - 6:15. Who studied longer?

Peter is overweight. He is 105 kg. His aim is to lose 500 g per week. If he manages this, how many weeks will it be until he is 90 kg?

30 g serving of a certain breakfast cereal has 0.5 g of salt. How much salt would that be in milligrams?

Chase measured a line for his art project. It is 200 millimeters long. How many centimeters is the line?

Carlos has a 1.2 meter long piece of wood. He wants to cut it into 3 equal lengths. How long should each piece be in millimeters?