Inside the Classroom
Under number 3, place three counters, so that two of them make a pair and the third one, placed under the first two, is without a “partner”
In a similar way, continue to place the right amount of counters under each number, making pairs whenever possible (as in the image below)
Note that some of the numbers have a counter that doesn’t have a “partner.” These numbers are called odd numbers (in French, numéros impaires): 1, 3, 5, 7, 9. The numbers for which all counters have “partners” are called even numbers (in French, numéros paires): 2, 4, 6, 8, 10.