# Thread: What are the rules for operations involving negatives and positives etc?

1. ## What are the rules for operations involving negatives and positives etc?

Would someone be kind enough to tell me what the rules are for operations involving negative numbers?

For instance is it correct that adding two negatives makes a positve?

Thanks

2. Originally Posted by Layman
Would someone be kind enough to tell me what the rules are for operations involving negative numbers?

For instance is it correct that adding two negatives makes a positve? no

Thanks

Amby's Math Resources - Integers: Operations with Signed Numbers

3. The confusion arrises when you hear at school (by a teacher not thinking about how students interpret their info) that two negatives make a positive (bad teacher)

Now that sounds fine on the surface because -2 x -6 = + 12.

But students then switch off their brains and think

-4 - 6 = + 10 : here you have to ignore rules of signs and add up : lose 4 then lose 6 - i have lost 10 (-10)

Put simply: WHEN multiplying or dividing
Signs the same -> positive answer