What will?

mathematics

3.0, multiply or divide 0 by any number to get 0.

4. If the absolute value of m =5, the absolute value of n =2 and the absolute value of m-n = n-m, then the value of =n-m (d).

According to the meaning of the question: m=5 or -5, n=2 or -2.

①

Let m=5 and n=2.

A 5-2 = 3, and the absolute value of 3 is 3

B 2-5=-3, and the absolute value of -3 is 3.

A equals b, so n-m equals-3.

②

Let m =-5 and n = 2.

C-5-2 =-7, and the absolute value of -7 is 7.

D 2-(-5) = 7, and the absolute value of 7 is 7

C equals d, so n-m=7 equals 7.

③

Let m=5 and n=-2.

E 5-(-2) = 7, and the absolute value of 7 is 7

F -2-5=-7, and the absolute value of -7 is 7.

E equals f, so n-m equals-7.

④

Let m=-5 and n=-2.

G-5-(-2) =-3, and the absolute value of -3 is 3

H -2-(-5)=3, and the absolute value of 3 is 3.

G equals h, so n-m=3 equals 3.

Therefore, choose D in this question.