The answer to the question on page 44 10 in the first volume of mathematics in the third grade of primary school is a rectangular vegetable field, 8 meters long and 5 meters wide. Put a fence around the vegetable field. How long is the fence? A rectangular vegetable field, 8 meters long and 5 meters wide. Put a fence around the vegetable field. How long is the fence?

(8+5)×2=26 (m)

If the vegetable field touches the wall, how long is the fence at least?

8+5×2= 18 (m)