How do you distinguish the difference between a negative sign …
2012年10月20日 · But the point is that case 3. perfectly well covers cases like $-5$ or $-5.272023$: the value denoted is the opposite of that of the (right) operand of the minus sign. …
abstract algebra - Why is negative times negative = positive ...
If I start with a negative number, it's already on the negative half of the number line and will be flipped to the positive half: $-2 \times -3 : -3 \rightarrow -6 \rightarrow 6$. That is, multiplication …
If there is a negative sign beside the fraction bar, does that mean …
2018年11月6日 · $\begingroup$ Are you concerned only with fractions in which both the numerator and denominator are explicitly named integers, such as $-\frac 23,$ or does this …
"Negative" versus "Minus" - Mathematics Stack Exchange
the -symbol when used as a prefix is as a unary arithmetic operator, and makes sense neither as a specification of a negative number (after all, -(-7) is certainly positive!) nor as the adjective …
notation - How to position negative sign of fraction - Mathematics ...
2015年5月29日 · To say that it has a "negative denominator" or a "negative numerator" or that the "whole fraction" is negative is not mathematically meaningful. A number is either negative or it …
Why does an integral change signs when flipping the boundaries?
2015年6月8日 · $\begingroup$ Generally, going to the right means "positive" and going to the left means "negative". So, measuring the area from left-to-right gives us a positive signed area, …
Why do we reverse inequality sign when dividing by negative …
We need to flip the sign to make it true. $-7$ appears smaller than $-9999$ but it really isn't. For negative numbers, things are flip-flopped. NOTE: Multiplying by a negative is multiplying by a …
When to apply negative sign when number is squared
2019年4月21日 · $\begingroup$ Though beware Excel and some similar cases, where =-1^2 gives 1 but =0-1^2 gives -1, because if interprets the former as $(-1)^2$ and the latter as $0 …
Should we distinguish the minus sign from the negative sign?
2019年2月16日 · Pupils get confused about the rules involving the $-$ sign partially because of this intentional mix-up by mathematicians and teachers (another, though related, source of …
Why does the sign have to be flipped in this inequality?
2015年11月24日 · It is just the fact that the product of a negative number by a positive is negative. You have $25-5m>0$. If you multiply by the negative number $-1/5$, the result is negative: $$ …