Question

What must be subtracted from $-3$ to get $-9$?

Answer 1

Determine the number which will be subtracted from $-3$ to get $-9$.

Let the number be $a$.

According to the question.

$$\begin{gathered} -3-a=-9 \\ \Rightarrow -a=-9+3 \\ \Rightarrow -a=-6 \\ \therefore a=6 \end{gathered}$$

Hence, the required number is $6$.