Practice problem
Select the example(s) of the identity property.
ab+0=ab\frac ab+0=\frac abba+0=ba
ab+cd=cd+ab\frac ab+\frac cd=\frac cd+\frac abba+dc=dc+ba
ab+(−ab)=0\frac ab+\left(-\frac ab\right)=0ba+(−ba)=0
ab(cd+fg)=acbd+afbg\frac ab\left(\frac cd+\frac fg\right)=\frac{ac}{bd}+\frac{af}{bg}ba(dc+gf)=bdac+bgaf
ab×1=ab\frac ab\times1=\frac abba×1=ba
ab×−1=−ab\frac ab\times-1=-\frac abba×−1=−ba
ab+(cd+fg)=(ab+cd)+fg\frac ab+\left(\frac cd+\frac fg\right)=\left(\frac ab+\frac cd\right)+\frac fgba+(dc+gf)=(ba+dc)+gf
Type a concept, like “slope” or “photosynthesis”.
