[raees]

7 - 4 + 3 x 0 + 1

This question was posted on google+. Some people were posting the answer as 1, a majority as 4 and a few as 2.

I understand that 1 is incorrect because a certain rule is not being applied.

But I don't know whether the correct answer is 4 or 2.

I understand that multiplication is carried out before division in terms of operations.

So you get 7 - 4 + 0 + 1

At the next step however I always thought you would do the same for addition being applied first and then subtraction so in that case, it would be....

7 - 5 = 2

So.. is 2 correct or do you first apply subtraction and THEN addition to get 4?

[Above.The.Empyrean]

What you're bemused over is you're viewing it as

The answer is 4. There are no parentheses, ergo, it's

[raees]

so after doing the multiplication bit, you go back to applying operations left to right?

[f1mad]

7 - 4 + 3 x 0 + 1

Do the multiplication first and consider addition and subtraction equally (i.e moving from left to right).

[Khallil]

(Original post by raees)
7 - 4 + 3 x 0 + 1

This question was posted on google+. Some people were posting the answer as 1, a majority as 4 and a few as 2.

I understand that 1 is incorrect because a certain rule is not being applied.

But I don't know whether the correct answer is 4 or 2.

I understand that multiplication is carried out before division in terms of operations.

So you get 7 - 4 + 0 + 1

At the next step however I always thought you would do the same for addition being applied first and then subtraction so in that case, it would be....

7 - 5 = 2

So.. is 2 correct or do you first apply subtraction and THEN addition to get 4?

Follow the rules of BIDMAS/BODMAS
1. Brackets
2. Orders/Indice
3. Multiplication
4. Addition
5. Subtraction

7 - 4 + 3 * 0 + 1

No brackets or indices. Skip to no. 3
First you multiply 3 by 0 ( 0 by 3 is the exact same )
Now you are left with

7 - 4 + 1

Following no. 4 is addition which gives

7 - 3 or 8 - 4
Either way the final answer is 4 !

These questions are notoriously overused on Facebook and Google+
Enjoyable but overused.

[TenOfThem]

Addition and subtraction are the same operation (as indeed are multiplication and division) so they operate as left to right

[raees]

oh! ok I get it now, but what happens if its say 7 / 4 * 3 ?

would you do 7 / (4 *3) ?

[f1mad]

(Original post by raees)
oh! ok I get it now, but what happens if its say 7 / 4 * 3 ?

would you do 7 / (4 *3) ?

You would do 7/4 then *3 (L->R).

[Lord of the Flies]

(Original post by raees)
oh! ok I get it now, but what happens if its say 7 / 4 * 3 ?

would you do 7 / (4 *3) ?

No:

[Brit_Miller]

(Original post by Khallil)
...

These questions are notoriously overused on Facebook and Google+
Enjoyable but overused.

I love the 1+1+...+1x0 ones - there's always comments from people going something along the lines of, "omg i carnt beleeve these idiots, its 0 ffs!!1"

[TheGrinningSkull]

(Original post by raees)
7 - 4 + 3 x 0 + 1

This question was posted on google+. Some people were posting the answer as 1, a majority as 4 and a few as 2.

I understand that 1 is incorrect because a certain rule is not being applied.

But I don't know whether the correct answer is 4 or 2.

I understand that multiplication is carried out before division in terms of operations.

So you get 7 - 4 + 0 + 1

At the next step however I always thought you would do the same for addition being applied first and then subtraction so in that case, it would be....

7 - 5 = 2

So.. is 2 correct or do you first apply subtraction and THEN addition to get 4?

Where did this 5 come from?

7 - 4 + 1, if you have -4 +1 then you get -3; not -5

So either way the final answer is 4.

Like it has already been mentioned, you'd go in order anyway and substitution/addition are in the same line of priority.

[raees]

(Original post by TheGrinningSkull)
Where did this 5 come from?

7 - 4 + 1, if you have -4 +1 then you get -3; not -5

So either way the final answer is 4.

Like it has already been mentioned, you'd go in order anyway and substitution/addition are in the same line of priority.

thank you!

[TheGrinningSkull]

(Original post by raees)
thank you!

No worries