A simple algorithm of 2 divided by 0.5-0.5 divided by 2

A simple algorithm of 2 divided by 0.5-0.5 divided by 2


2/0.5-0.5/2
=2/(1/2)-(1/2)/2
=2*2-1/2*1/2
=4-1/4
=3 and 3 / 4



A simple algorithm of 0.99 * 9 + 0.99


0.99*9+0.99
=0.99×(9+1)
=0.99×10
=9.9