Question

Add : $3\mathrm{xyz}$ and $-3\mathrm{xyz}$

Answer 1

HORIZONTAL METHOD

Step 1. Connect all the expressions by plus signs.

$\Rightarrow 3\mathrm{xyz}+(-3\mathrm{xyz})$

Step 2. Open the brackets and collect the like terms in groups.

$\Rightarrow 3\mathrm{xyz}-3\mathrm{xyz}$

Step 3. Add the like terms

$\Rightarrow 3xyz-3xyz=0$

Hence, $0$ is the sum of the given algebraic expressions