Standard units of measuring length
Keywords: Centimetre, Metre, Scale
Teacher’s Note: Teacher can facilitate the children to discuss about the use of standard units of measurement.
Measuring by standard unit
Objects of greater length are measured in metre (m) and objects of smaller length are measured in centimetre (cm).
Photo frame is measured in Centimetre.
Saree is measured in metre.
Tick (✔) the appropriate unit to measure the following objects.
Let us learn to measure the length of the objects using scale.
Teacher’s Note: Teacher should encourge children to count the centimetre. The object can be kept at different value say 3cm or 5cm instead of 0 to ensure the children count and right the length of the object.
Observe the picture in previous page and write the length of the objects. One is done for you.
Length of the comb is 12 cm.
Length of the straw is 10 cm.
Length of the pencil Is 14 cm.
Length of the crayon is 7 cm.
Fill in the boxes by measuring the length of the objects using handspan, eraser and centimetre scale.
i. Teacher can make the students to measure various objects in the surrounding by guessing and by actual measurement.
ii. Enable the students to appreciate the need for standard tool for measuring length.