click below
click below
Normal Size Small Size show me how
8th CCSSM NUMBER SYS
8th MATH COMMON CORE CCSSM NUMBER SYSTEMS-COMPLETE
Term | Definition |
---|---|
Real Numbers | The type of number we normally use, such as 1, 15.82, −0.1, 3/4, etc. Positive or negative, large or small, whole numbers or decimal numbers. They are called this because they are not Imaginary Numbers. |
Irrational numbers | a real number that cannot be expressed as a ratio of integers, i.e. as a fraction. Therefore, when written as decimal numbers, these do not terminate, nor do they repeat |
Rational numbers | A number that can be made by dividing two integers. (e.g. a/b) The word comes from "ratio". Examples: • 1/2 (1 divided by 2, or the ratio of 1 to 2) •0.75 (3/4) • 1 (1/1) • 2(2/1) • 2.12 (212/100) • −6.6 (−66/10) |
Integers | a whole number (not a fractional number) that can be positive, negative, or zero. Examples are: -5, 1, 5, 8, 97, and 3,043. |
Whole numbers | The numbers {0, 1, 2, 3, ...} etc. There is no fractional or decimal part and no negatives. |
Natural numbers | The whole numbers from 1 upwards: 1, 2, 3, and so on ... Or from 0 upwards in some fields of mathematics: 0, 1, 2, 3 and so on ...No negative numbers and no fractions |
radical | An expression that has a square root, cube root, etc. The symbol is √ |
radicand | The value inside the radical symbol. The value you want to take the root of. In √x, "x" is the ________________. |
square root | a value that, when multiplied by itself, gives the number. Example: 4 × 4 = 16, so a ______________ of 16 is 4. |
perfect square | A number made by squaring a whole number. 16 is a ______________________ because 4 squared = 16; 25 is also a ____________ because 5 squared = 25, etc |
cube root | a special value that, when used in a multiplication three times, gives that number. Example: 3 × 3 × 3 = 27, so the ____________ of 27 is 3. |
terminating decimal | A decimal number that has digits that do not go on forever. Examples: 0.25 (it has two decimal digits); 3.0375 (it has four decimal digits) |
repeating decimal | A decimal number that has digits that repeat forever. e.g. 1/3 = 0.333... (the 3 repeats forever) AKA recurring decimal |
truncate | A method of approximating a decimal number by dropping all decimal places past a certain point without rounding. For example, 3.14159265... can be _______________ to 3.1415. |