What is a part-whole model? A part-whole model can be used to show the parts that make up a whole number. You can use them to show relationship between the whole and the parts that make up the whole.
A ratio compares two or more quantities by using parts of a whole. In this bracelet, there are 2 parts red compared to 3 parts blue. The ratio of red beads to blue beads is 2 : 3. This is said aloud ...
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