What is the proper way to solve this problem 879000- 21989=

Your answer would be ahere is how: perimeter is how long all the sides are. in a rectangle, there are two sets of parallel sides. so, to find this, we would to the following.(15x2)+(4x2)30+838if you have questions ask! and mark me brainliest! i really wanna level up : 3

For the first question the answer is a, for the second c, for the third d, for the 4th b, for the 5th a