This is a centimetre ruler. The abbreviation for centimetre is cm.
Measure from 0 mark on the ruler. The pencil is according to this ruler 4.5 cm in length. It may be necessary to approximate the measurement of the items to the nearest whole number. Thus, this pencil is approximately 5 cm in length.
Note: Use your understanding of fractions to help you understand the number 4.5. Above, every 10 strokes represent one centimetre. Half way is 5 strokes or 5/10 which is also 0.5.
The video below will help you understand how to use a ruler to measure things.
Gather the following items and measure them with your ruler. Do this activity with a parent or in class!
- note book
- dollar coin
- small toy car
- glue stick
You can also find familiar items around you that you can measure. Enjoy the activity!
Draw some lines that measure various lengths, such as: 6 cm, 4 cm, 9 cm.
Measure the following in your classroom: the desk, black board, the width of the doorway, the bookshelf, drawers, teacher’s desk, and the length and width of your classroom.
Take a walk around the neighbourhood and check the distance traveled. For instance, note the distance between your home to the nearby grocery store, or to school, or church, or to grandmother, or your friend.
These activities are important. Do them! Then proceed to the exercises.