$\backslash$Vector Review and $1$D Linear Kinematics.

$A=3\mathrm{.}45$hat$()+1\mathrm{.}25$hat$()-0\mathrm{.}66$widehat$(k)$

$B=6\mathrm{.}20$hat$()-3\mathrm{.}12$hat$()+4\mathrm{.}22$widehat$(k)$

Problem $1$

Calculate: $,A+B,B-A,C+B,A-D$