Question 160215
You can see that 3.95 is close to 4.00 or exactly 4.00-0.05.
and that 
.
.
.
{{{7*3.95=7(4.00-0.05)}}}
{{{7*3.95=7*4.00-7*0.05}}}
{{{7*3.95=28.00-0.35}}}
{{{7*3.95=27.65}}}
.
.
.
7*$3.95=$27.65, no calculator needed thanks to the distributive property.