Level 1 · Ages 6–8
Look around you: a pencil, an eraser, a notebook. Some objects are long, others are short. To find out which one is longer, you can place them side by side, carefully lining up their ends at the same spot. The one that sticks out is the longer one!
But sometimes you cannot put the objects side by side. How can you compare the length of your table with the length of your bed? That is where measuring becomes magical: we use a tool, the ruler, which gives a number to every length.
On your ruler, you see small marks with numbers: 0, 1, 2, 3... Each gap between two numbers is 1 centimetre. The centimetre is a small unit, perfect for measuring a pencil or an eraser.
To measure, there is a golden rule: place one end of the object exactly on the 0, then read the number next to the other end. That number is the length in centimetres.
Once every object has its number, comparing becomes easy: the bigger number wins! A 15 centimetre ribbon is longer than a 12 centimetre pencil. Your turn to play!
Read it again any time, including while you work through the exercises.
Look around you: a pencil, an eraser, a notebook. Some objects are long, others are short. To find out which one is longer, you can place them side by side, carefully lining up their ends at the same spot. The one that sticks out is the longer one!
But sometimes you cannot put the objects side by side. How can you compare the length of your table with the length of your bed? That is where measuring becomes magical: we use a tool, the ruler, which gives a number to every length.
On your ruler, you see small marks with numbers: 0, 1, 2, 3... Each gap between two numbers is 1 centimetre. The centimetre is a small unit, perfect for measuring a pencil or an eraser.
To measure, there is a golden rule: place one end of the object exactly on the 0, then read the number next to the other end. That number is the length in centimetres.
Once every object has its number, comparing becomes easy: the bigger number wins! A 15 centimetre ribbon is longer than a 12 centimetre pencil. Your turn to play!
Measure a pencil with your ruler.
bout du crayon → 0
I lay the pencil along the ruler and place one end exactly on the 0.
autre bout → 12
I look at where the other end of the pencil reaches: right on the 12 mark.
longueur = 12 cm
The number I read gives the length: this pencil is 12 centimetres long.
Result: The pencil is 12 cm long.