Ratios as Multiplicative Comparisons

T.i.P.S.

The ratios used in this standard will compare like units, and students may be exposed to a number of ways to show ratios. For example, students may be given a part to whole relationship (7 boys in a class of 18 students) or a part to part relationship (11 girls and 7 boys in a class). Students need to practice with both in order to master this standard. Sometimes the multiplicative part will be included like Scott is twice as tall as Lexi. Exposing students to a variety of problem types will help them master this standard.

Example

John’s class took a field trip to the zoo. During the trip, he saw 12 bears and 36 animals from the big cat family. What is the ratio of bears to cats that John saw?

Hint
Possible Solution

TEKS

Supporting Standard

6.4 Proportionality. The student applies mathematical process standards to develop an understanding of proportional relationships in problem situations. The student is expected to:

(C) give examples of ratios as multiplicative comparisons of two quantities describing the same attribute

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