Question

Jessica is measuring two line segments.the first line segment is 30cm long. The second line segment is 500 mm long. How long are the two line segments together?

Answer 1

Answer:

800 mm or 80 cm

Step-by-step explanation:

We are given that Jessica is measuring two line segments.

Length of first line segment  =30 cm

Length of second line segment=300 mm

We have to find that Length of two line segments together

We know that 1 cm =10 mm

Length of firs line segment =$30\times 10=300 mm$

Length of two line  segments together=500+300=800 mm=$\frac{800}{10}=80 cm$

Hence, the length of two line segments together=800 mm=80 cm

Answer 2

You can change mm into cm.  Since 1 cm is equal to 100 mm, divide 500 by 100 to get 5 cm.  Add 30 and 5 to get 35.  The two line segments are 35 cm together.