Games and Exploration: Changing Order of the Addends

GAMES AND EXPLORATION USING BEAD BARS

e. Changing the Order of the Addends

Aim: to give the concept of the commutative property of addition (although it is not named as such at his age)

Materials: same as above

Presentation:
The teacher sets up an addition of two numbers, and the child completes the sum, placing the corresponding bead bars in their places. This equation is correct. The teacher switches the places of the two colored bead bars. Is it still correct? Perhaps it was a coincidence; let’s try another.

 

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