Question
Replace $A, B, C$ by suitable numerals: $ \ \ \ 5 \ \ 7 \ \ \text{A}\\\underline{-\text{C} \ \text{B} \ \ 8}\\\underline{ \ \ \ 2 \ \ 9 \ \ \ 3 \ \ }$
✓
Answer
$A - 8 = 3$ This implies that $1$ is borrowed. $11 - 8 = 3$
$\Rightarrow A = 1$ Then,$ 7 - B = 9$ 1 is borrowed from $7.$
$\therefore 16 - B = 9$
$\Rightarrow B = 7$
Further, $5 - C = 2$ But $1$ has been borrowed from $5.$
$\therefore 4 - C = 2$
$\Rightarrow C = 2$
$\therefore A = 1, B = 7$ and $C = 2$
$\Rightarrow A = 1$ Then,$ 7 - B = 9$ 1 is borrowed from $7.$
$\therefore 16 - B = 9$
$\Rightarrow B = 7$
Further, $5 - C = 2$ But $1$ has been borrowed from $5.$
$\therefore 4 - C = 2$
$\Rightarrow C = 2$
$\therefore A = 1, B = 7$ and $C = 2$
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