Question

If I have 3 positives, how many negatives must I have to zero?

Answer 1

Answer:

Worked Examples

What is 10 − 25?

Starting at 10, you move 25 numbers to the left, and you see immediately that the answer is −15.

Number line showing the sum 10 - 25.

What is −17 + 23?

This time you start at -17 and move 23 places to the right. You can see straight away that the answer is 6.

Number line showing the sum -17 + 23.

Subtracting Negative Numbers

If you subtract a negative number, the two negatives combine to make a positive.

−10−(−10) is not −20. Instead, you can think of it as turning one of the negative signs upright, to cross over the other, and make a plus. The sum would then be −10+10 = 0.

Answer 2

Answer:

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