Simple calculation of 9998 + 998 + 98 + 8 + 8

Simple calculation of 9998 + 998 + 98 + 8 + 8

9998+998+98+8+8
=(10000-2)+(1000-2)+(100-2)+(10-2)+8
=10000-2+1000-2+100-2+10-2+8
=10000+1000+100+10-2-2-2-2+8
=11110