Question

Sam wanted to find the difference 10 -(-6).

Answer 1

Given:

The expression is $10 - (-6)$.

Sam's calculation is $10 - (-6) = 10 + (-6) = 4$

To find:

Whether Sam's thinking correct or not.

Solution:

We have,

$10 - (-6) = 10+6$       $[\because (-)(-)=(+)]$

$10 - (-6) = 16$

$10 - (-6) \neq 4$

Therefore, Sam's thinking was incorrect.

On number first we have to move 10 units from 0 in positive direction after that negative sign means move in left direction.

But we have 2 negative signs so we need to move 6 units more on positive or right direct as shown below.