Explanation
According to BODMAS Rule:
3-(3x6)+2 (First we calculate multiplication or division)
3-(18)+2
(3-18)+2 (Since addition and subtraction has equal priority, we calculate in the order from beginning)
-15 +2
= -13

1. Think of it as money coming in and out of your bank account...

If you have \$3 and make a charge of \$18, then you have -\$15 in your account. Then adding \$2 makes it overdrawn -\$13.

BEDMAS can confuse people. The acronym is to remember the order of the components, but you still have to remember the entire list of rules.

Brackets
Exponents
Division and Multiplication
*(in the order they occur)
*(in the order they occur).

I was taught to do all the parenthesis then exponents, then insert brackets around the division & multiplication so it kept things in order.

So the equation is expressed as such

3 - 3 x 6 + 2
= 3 - (3 x 6) +2

Then you remember to do the equations inside brackets first, left to right, in the order they occur.

= 3 - (18) + 2

Then, since addition and subtraction are EQUAL, you do them IN ORDER, left to right.

= (3 - 18) + 2
= (-15) + 2
= (-13)

2. You are almost correct except for one mistake. BODMAS must be taken literally. You went wrong on the last part...MAS = Multiply, Add, Subtract. (ADD first, then SUBTRACT). = 3-18+2 = 3-20 = -17

1. hmm. no
When it comes to multiply/divide or add/subtract you work from left to right.

2. All of this multiply/divide or add/subtract you work from left to right???? What rubbish! It is quite simple: BODMAS...that is the Law on Arithmetic, Divide always comes before Multiply & Add always comes before Subtract! Don't make up your own rules. The Rules are already in place! BODMAS.

3. 3-3=0
0x6=0
0+2=2