The mathematical sign used in question 4 is inequality, but the symbol used in question 5 is equality. In mathematics, an inequality is a statement of fact or belief about two or more quantities. To express this idea mathematically, we use the word "not equal to" followed by two numbers with a hyphen between them. For example, not equal to 2 and not equal to -5 would mean different things (2 < 3 and 2 > 1 don't imply -5 < 0).
Equality is another matter; it is always expressed by using the word "equal to" with two identical objects attached to it. For example, books are equal to books and trees are equal to trees. Mathematicians often say that two things are equal when they are the same thing. For example, if I say that chairs and tables are equal, that means that they are both objects made out of wood.
In questions 4 and 5, inequality and equality were used respectively. As you can see, these two signs are very important in all areas of mathematics. Without knowing how to use them properly, some problems cannot be solved even after many attempts!
Basic mathematical symbols
|=||equals sign||5 = 2+3 5 is equal to 2+3|
|≠||not equal sign||5 ≠ 4 5 is not equal to 4|
|≈||approximately equal||sin(0.01) ≈ 0.01, x ≈ y means x is approximately equal to y|
|>||strict inequality||5 > 4 5 is greater than 4|
Less than , greater than (>), less than or equal (=), greater than or equal (>=), and not equal are the inequality symbols . These symbols are used to show that one number is smaller than another or that one quantity is less than or equal to another.
The words lesser than and greater than explain when you should use these signs. If you want to show that one number is larger than another, use the words more than or equal to. Finally, if you want to indicate that two quantities are of a similar size, use the word about equal to.
In mathematics, equality is considered to be an important concept. Numbers are often compared by comparing them to other numbers or to equality itself. For example, we can say that 5 is less than 7 or that 3 is less than or equal to 9. In both cases, the first statement shows that 5 has a lower value than 7 while the second statement shows that 3 is less than 7 but not as low as another number called 9.
Equality signs are also important in scientific notation. When we write 5 x 10^3, we are saying that 5 times 100,000. If we wanted to express this same fact but in standard form, we would have to write 500,000.
Symbols in Mathematics
|≠||not equal to||π ≠ 2|
|< ≤||less than, less than or equal to||2 < 3|
|> ≥||greater than, greater than or equal to||5 > 1|
|square root (“radical”)||√4 = 2|
This sign represents less than. For instance, 2 4 denotes that 2 is less than 4. This sign denotes greater than, as in 4 > 2. = = = formalized These symbols are often used in mathematics and signify "less than or equal to" and "greater than or equal to." They are also used to indicate an equality sign between two things.
As you can see, these symbols are very important in mathematics. Without them, math would be difficult if not impossible to do. Luckily, they are easy to find when needed - just look for the lower-case letters e, E followed by a number sign (#).
Basic mathematical symbols
|Symbol||Symbol Name||Meaning / definition|
|≠||not equal sign||inequality|
|>||strict inequality||greater than|
Each of the symbols
|>||greater than||5 > 2|
|<||less than||7 < 9|
|≥||greater than or equal to||marbles ≥ 1|
|≤||less than or equal to||dogs ≤ 3|
Symbols of Basic Mathematics