5'1 in height plus 7 cm how tall am I ?

Julia is going for a walk through the neighborhood. what unit of measure is most appropriate to describe the distance she walks?

The lengths of all sides of a triangle are integers when measured in decimeters. one of the sides has length of 1 dm and another of 3 dm. find the perimeter of the triangle.'

Evaluate the expression. (9 + 5)(3 + 2)0