Page 98 - Demo

98 Arrow-Puffin-2_Semester-2 MathsSTANDARD UNIT OF LENGTHThe standard unit of length is metre. One metre is divided into 100 smaller units, one unit of metre is called a centimetre.1 metre=100 centimetres1000 metres put together to make a bigger unit called a kilometre.1 kilometre = 1000 metresNote: In short, we write : centimetres as cm. metres as m. kilometres as km.We use different measuring scales to measure length of objects.pencil eraser handspan footspanMEASURING LENGTHLength is the distance end to end. Length can be measured using objects such as pencils, erasers and ropes.Length can also be measured using body parts such as fingers, handspan and footspan.Bottles, erasers, pencils, handspan, footspan, etc. do not give the same measurement all the time. (The handspan and footspan of a teacher are bigger than the child%u2019s handspan and footspan). So, we need to have standard units of measurement.0cm 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15scale tapesIn ancient times, body parts were used for measuring length.Let's Understand Conceptual UnderstandingLet's Understand Conceptual Understanding