Question

Add without using the number line

$3+9$

Answer 1

Here, both integers are positive.

Absolute value of $3=\left|3\right|=3$

Absolute value of$9=\left|9\right|=9$

Sum of their absolute values $=3+9=12$

Since, the sign of the addend is$“+”$

Therefore,$3+9=12$.