Measure the height of your friend and express it in (i) metres (ii) centimetres and (iii) millimetres.
Express height in metres
If the measured height is, for example, 145 cm, then height in metres = 145 ÷ 100 = 1.45 m. A typical Class 6 student's height ranges from 1.3 m to 1.5 m.
Express height in centimetres
The height measured directly using a metre scale or measuring tape will be in centimetres. A typical Class 6 student's height ranges from 130 cm to 150 cm.
Express height in millimetres
If the measured height is 145 cm, then height in millimetres = = 1450 mm. A typical Class 6 student's height ranges from 1300 mm to 1500 mm.
Explanation
(i) To convert centimetres to metres, divide by 100 (as stated in the chapter: 1 m = 100 cm). (ii) Metre scales have markings in centimetres, making direct measurement in cm convenient. (iii) To convert centimetres to millimetres, multiply by 10 (as stated in the chapter: 1 cm = 10 mm).