Question

shane has 5 meters of cloth. He needs 16 meters more cloth to make some curtains. How many meters of cloth are needed to make the curtains?

Answer 1

16 + 5= 21 meters I guess

Answer 2

If Shane already has 5 meters and needs just 16 meters more to make some curtains, to find out the total meters of cloth needed for the curtains just add 5 meters and 16 meters. 
5+16=21 
The answer to your questions is 21 meters

Hope this helps! :)