The width of the rectangular field is 65!! If two of the sides are 91 m, that’s already 182 m of your perimeter. Then subtract 182 from 312 to get 130. Finally, divide 130 in half to get your answer of 65.
OH MY GOSH I THINK I GET IT! difference as in division. it wants you to i think make for example make 2 the answer to an equation like 5-3=2! 5 and 3 are prime numbers.
