Question

10 - 2, 12 - 3, 15 - 9

Explanation:

Step1: Subtract 2 from 10

$10 - 2 = 8$

Step2: Subtract 3 from 12

$12 - 3 = 9$

Step3: Subtract 9 from 15

$15 - 9 = 6$

Answer:

For

$$\begin{array}{r}10\\ -2\\ \hline\end{array}$$

: 8
For

$$\begin{array}{r}12\\ -3\\ \hline\end{array}$$

: 9
For

$$\begin{array}{r}15\\ -9\\ \hline\end{array}$$

: 6