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Yuan Yuan and his mother are 28 years old. How old was Yuanyuan when her mother was 32?
Solution: It is known that Yuanyuan and her mother are 28 years old.

Rounded age +28= mother's age,

When mom was 32,

Integer age = mother's age -28 years old

=32-28

=4 years old

A: When my mother was 32 years old, Yuanyuan was 4 years old.