Through the preview, I know: millimeter, centimeter, decimeter, meter, kilometer (kilometer). 1km = 1000m 1m = 10mm = 10cm = 1000mm。 Knowing this knowledge, I measured my height with a tape measure: my brother 1m, 13cm, me 1m, 35cm. 1m35cm-1m13cm = 22cm, I am 22cm taller than my brother.

English unit of length

After 1959, the American imperial inch and the British inch were unified as 25.4 mm in scientific application and commercial use, but the American system kept a slightly different "measurement inch" used in measurement.

1 inch) = 2.54 cm.

1 ft) = 12 inch? = 30.48 cm.

1 yard) = 3 feet? = 9 1.44 cm.

1 mile) = 1760 yards? = 1.609344 kilometers (km).

The above conversion, the two units are the same, but the intermediate units such as chain (22 yards) and wave (220 yards) are used more in Britain.