# Bead Bars: Changing the Order of the Addends

From wikisori

## Contents

### Age

4-7.

### Materials

- Tten bars
- Colored bead bar
- Box of signs for operations

### Preparation

### Presentation

- The directress 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 directress switches the places of the two colored bead bars. Is it still correct? Perhaps it was a coincidence; let's try another.

### Control Of Error

### Points Of Interest

### Purpose

- To give the concept of the commutative property of addition.

### Variation

### Links

### Handouts/Attachments