What is the first step when measuring an object with a ruler?

Line up the left end of the object with the zero mark on the ruler.

Explain how to identify the half-inch marks on a ruler that has many tick marks.

The half-inch mark is usually the longest tick mark between the whole inch marks.

I can measure objects to the nearest inch and half inch using a ruler.

1
When measuring with a ruler, always line up the left end of the object with the zero mark on the ruler.
2
The small lines in between the whole inch marks represent half inches, and the longest of these lines is typically the ½ inch mark.
3
When measuring to the nearest half inch, the measurement will either land on a whole inch mark or a ½ inch mark.