We built houses with Cuisenaire Rods and then estimated and calculated how many units were used in each structure.
Cuisenaire Rods come in 10 different colors. The white blocks are 1
cm cubes. The remaining rods are each 1 cm longer than the previous.
1 cm = white
2 cm = red
3 cm = green
4 cm = purple
5 cm = yellow
6 cm = blue-green
7 cm = black
8 cm = brown
9 cm = blue
10 cm = orange
For the structure above the math was done as follows:
orange - 10 rods used x 10 cm^3 per rod = 100 cm^3
brown - 8 rods used x 8 cm^3 per rod = 64 cm^3
blue-green - 6 rods used x 6 cm^3 per rod = 36 cm^3
purple - 4 rods used x 4 cm^3 per rod = 16 cm^3
green - 2 rods used x 3 cm^3 per rod = 6 cm^3
white - 1 rods used x 1 cm^3 per rod = 1 cm^3
Next the totals were added together: 100 + 64 + 36 + 16 + 6 + 1 = 223 cm^3
Finally we used comparison (subtraction) to determine who had the closest estimate.
To see more of our hands on math activities please visit our Math Page.
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