maths apps for practising ml/mm/kg conversions?

[aprilshowerssoon]

Are there any maths apps or books that have questions that help to affirm how to covert mm to cm/ g to kg etc etc ? thanks

It's not an App, website, but you can practice.

www.khanacademy.org/math/cc-fourth-grade-math/cc-4th-measurement-topic/cc-4th-convert-length/v/converting-metric-distance

www.khanacademy.org/math/cc-fourth-grade-math/cc-4th-measurement-topic/cc-4th-unit-conversion/e/converting-larger-units-to-smaller-units--grams-and-kilograms-

www.khanacademy.org/math/cc-fourth-grade-math/cc-4th-measurement-topic