how do you come up with the number 11 using only 4 4,s?

Question

Using only 4 number 4's, how do you come up with the number 11? Also using the same method to come up with 15 and 19. Please help!!!!

Answer 1

11=(4)/(0.4)+(4/4)

19=(4!)-4-(4/4) because 4!=4*3*2*1=24

 

Answer 2

4 x 4 - 4/4 = 16 - 1 = 15