Jawapan

2015-11-04T13:24:05+08:00
SymbolName and MeaningExample Problem+addition: to add something to another something14 + 6 = 20subtraction: to subtract something from something else13 – 10 = 3·multiplication: to multiply something with something else, designed so x variables don’t get mistaken for multiplication12 · 6 = 72/division: to divide something by something else150/5 = 30 √square root: to divide a number by its perfect square, also known as a radical √4 = 2 ( )parenthesis: grouping symbols, also known as round brackets 2 + (7 – 3) = 2 + 4 = 6[ ]brackets: grouping symbols, also known as square brackets2 + [7 – (3 + 6)] = 2 + (7 – 9) = 2 – 2 = 0{ }set symbols: used for showing sets, also known as curly brackets when used as another set of bracketsset: whole numbers = {1, 2, 3, …}
curly brackets: 2 + {7 – [3 + (6 – 4)]} = 2 + [7 – (3 + 2)] = 2 + (7 – 5) = 2 + 2 = 4
=equals: to show what an equation’s answer is3 + 7 = 10 ≈about: is approximately equal to Π ≈ 3.14 ≠not equal: to show that it is not a correct answer 2 ≠ 3 <less than: one item has less value than another 2 < 3 ≤less than or equal to: one item has less value than the other or equal value to the other 2 ≤ 3 >greater than: one item has greater value than the other 3 > 2 ≥greater than or equal to: one item has greater value than the other or equal value to the other 3 ≥ 2implies: implies that if one thing is true then the other must be too, also known as if… then statements 7 and 5 are odd ⇒ 7 + 5 is eveniff: if and only if, can also mean is equivalent to7 = 4 + 3 ⇔ 4 = 7 – 3therefore: some value is equal to another value meaning the opposite will also be equal