If $20-10=200$, $8÷4=12$, and $6\times 2=4$, find the value of the expression:
$$100\times 10-1000+1000÷100-10$$

Let's decipher the true mathematical meaning behind each sign based on the given samples:
* $20-10=200⟹$ '-' means '$\times$ '
* $8÷4=12⟹$ '$÷$ ' means '$+$ '
* $6\times 2=4⟹$ '$\times$ ' means '$-$ '
* By extension of logic, '$+$ ' must mean '$÷$ '

Now substitute these actual operators into the given target expression:

$$\text{Expression}=100\times 10-1000+1000÷100-10$$

Replacing the signs:

$$\text{Expression}=100-10\times 1000÷1000+100\times 10$$

Applying the BODMAS rule:

1. Division ($÷$):

$$1000÷1000=1$$

So the expression becomes:

$$100-10\times 1+100\times 10$$

2. Multiplication ($\times$):

$$10\times 1=10$$

$$100\times 10=1000$$

The expression becomes:

$$100-10+1000$$

3. Addition and Subtraction ($+/-$):

$$100-10+1000=90+1000=1090$$