If you multiply a negative by a negative, you get **a positive** because the two negative signs cancel.

Contents

- What is a minus number times a minus number?
- Why is a minus times a minus a plus?
- Is a minus times a minus positive?
- What is a minus XA minus?
- What’s a minus times a plus?
- What is Bodmas?
- What is a minus times a positive?
- Do two negatives make a positive in multiplication?
- Who invented zero in world?
- Which is correct Pemdas or Bodmas?
- Is Bodmas wrong?

Multiplying a negative number by another negative number makes the **product positive**.

So the fact that the product of two negative numbers is positive is because **the inverse of the inverse of a positive number returns that positive number**.

Using the fact that multiplication is commutative, **a negative times a positive is also negative**. Likewise, we can prove that a negative times a negative is a positive. Since we know that −ab is negative and the sum of these two terms is 0, (−a) × (−b) is positive.

When two negative numbers are multiplied or divided together, the answer is positive. **When a positive number and a negative number are multiplied or divided, the result is negative**.

Rule 2: A negative number multiplied by a positive number results in **a negative number**. If you multiply a negative number by a positive number, your answer is a negative number. It doesn’t matter in which order the positive and negative numbers are multiplied, the result is always a negative number.

BODMAS is an acronym for the sequence of operations that must be performed while simplifying the mathematical expressions. So BODMAS stands for **parentheses, order, division, multiplication, addition and subtraction**.

If you multiply a negative number by a positive number, then **the product is always negative**. When you multiply two negative numbers or two positive numbers, the product is always positive. 3 times 4 is 12.

**Yes, two negatives make one positive**, and we’ll explain why with examples!

“Zero and its operation were first defined by [Hindu astronomer and mathematician] **Brahmagupta** in the year 628,” Gobets said. He developed a symbol for zero: a dot among numbers.

The term PEMDAS is mainly used in the US, but in India and the UK we call it BODMAS. But **there is no difference between them**. The order of operations for brackets, orders, addition, subtraction, multiplication, and division is the same for both rules.

Wrong Answer

This would be a really useful algorithm if it worked in every situation, but consider the much simpler expression 1 – 2 + 4 . It doesn’t contain parentheses, powers, divisions or multiplications, so we follow BODMAS and do the addition followed by the subtraction: **This is wrong**.

- https://www.varsitytutors.com/act_math-help/how-to-multiply-negative-numbers
- https://www.math.toronto.edu/mathnet/questionCorner/minustimesaminus.html
- https://davidwees.com/content/why-is-a-negative-times-a-negative-positive/
- https://revisionmaths.com/gcse-maths-revision/number/positive-negative-numbers
- https://www.k5learning.com/blog/multiplying-positive-and-negative-numbers-3-simple-rules
- https://byjus.com/maths/bodmas-rule/
- https://www.mathplanet.com/education/pre-algebra/explore-and-understand-integers/multiplying-and-dividing-with-integers
- https://www.mathsisfun.com/multiplying-negatives.html
- https://www.livescience.com/27853-who-invented-zero.html
- https://byjus.com/maths/pemdas/
- https://www.teachwire.net/news/why-its-time-for-maths-teachers-to-bin-bodmas

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