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# Fritzke-Math-grade4

### Math Vocab for Fourth Graders

Question | Answer |
---|---|

in a mathematical sentence, this is a symbol used to represent an unknown number or a number that varies (hint: it is usually represented by a lowercase letter) | variable |

to rewrite a fraction as an equivalent fraction with a smaller numerator and denominator, (to put a fraction in simplest form) | simplify |

the difference between the greatest number and the least number in a set | range |

a solid three-dimensional shape with two identical parallel bases, and all other faces formed by rectangles or parallelograms | prism |

lines going in the same direction that are always the same distance apart, these never meet or cross | parallel lines |

the number found by dividing the sum of a set of numbers by the number of addends (this is also known as the AVERAGE) | mean |

a unit fraction representing one of one hundred equal parts, this is written as 1/100 | hundredths |

the amount of time that passes from the start of an activity to the end | elapsed time |

used to show position in a coordinate plane or map. An example is (1,3) | coordinates |

a face of a three-dimensional polyhedron by which the figure is measured or classified (a cylinder or cone has a circular one of these) | base |

the transformation of a figure by moving it without turning or flipping it in any direction (hint: fancy word for a slide) | translation |

a triangle with no equal sides (all lengths are different) | scalene |

the distance from the middle of a circle to any point on the circle (half the diameter) | radius |

a number greater than 1 that has exactly 2 factors (it only has a factor of 1 and itself) | prime number |

a number less than 0, but not a fraction or a decimal (it uses a negative sign) | negative integer |

a triangle with two congruent sides (2 sides are the same length) | isosceles |

one or more numbers, variables, or numbers and variables, with one or more operations. ex: (12-4) + 3 | expression |

the height, length, or width or a figure or object (The term 3-D is used to describe objects with three of these) | dimension |

numbers that have three or more factors | composite number |

a real or imaginary reference line, it can be horizontal or vertical | axis |

a unit fraction representing one of a thousand equal parts of a whole, it is written 1/1000 | thousandth |

the turning of a figure around a given point | rotation |

any quarter of a plane divided by an x and y axis (this forms a quarter of a circle) | quadrant |

the value of a digit as determined by its place in a number, an example of this is the tens place | place value |

the number that occurs most frequently in a set of data | mode |

lines that meet at a point, these look like an X | intersecting lines |

to find the approximate value or measurement of something (you can do this to guess how many marbles are in a jar) | estimate |

the distance across a circle through its middle, it is the longest chord of a circle | diameter |

a number divisible by all of the denominators of a set of fractions being considered (the number 30 is this for 1/6 and 1/15) | common denominator |

an addition and multiplication rule stating that no matter how numbers are grouped, the answer will always be the same (3 + 2 is the same as 2 + 3) | associative property |

a unit fraction representing one of ten equal parts of a whole, it is written as 1/10 | tenth |

the transformation of a figure by reflecting it over a line, creating a mirror image of the figure (sometimes called a flip) | reflection |

that chance that a particular outcome will occur | probability |

lines that lie on the same plane that intersect to form right angles | perpendicular lines |

the number in the middle of a set of data arranged in order from least to greatest or greatest to least | median |

a shape that has equal sides | equilateral |

a number system based on 10 | decimal system |

the distance around a circle | circumference |

a number to be added to another | addend |

Created by:
fritzsar