| A | B |
|---|
| fraction | number that names a part of a whole or part of a group |
| numerator | number above the bar in a fraction that tells how many parts are going to be considered |
| denominator | the number below the bar in a fraction that tells the total number of equal parts |
| equivalent fraction | two or more fractions that name the same amount |
| decimal | number that uses place value and a decimal point to show values less than one, such as tenths and hundredths |
| equivalent decimal | two or more decimals that name the same amount |
| fact family | set of related addition and subtraction or multiplication and division number sentences |
| remainder | the amount left over when you find a quotient |
| dividend | the number that is being divided in a division problem |
| divisor | the number divides the dividend |
| quotient | the answer to a division problem |
| expanded form | a way to write numbers by showing the value of each digit (253=200=50=3) |
| equation | a number sentence that shows that 2 amounts are equal |
| vertically | up and down |
| horizontally | side to side or left to right |
| estimate | to find an answer that is close to the exact answer |
| perimeter | the distance around a figure |
| addend | a number that is added |
| sum | the answer to an addition problem |
| difference | the answer to a subtraction problem |
| inverse | opposite operations that undo each other, such as +- |
| multiple | a number that is the product of a given number and another whole number |
| factor | a number that is multiplied |
| product | the answer to a multiplication problem |
| prime number | a number that can only be divided by itself and 1 |
| composite number | a number that is not a prime number |
| area | the number of square units needed to cover a flate surface |
| capacity | the amount a container can hold when filled |
| ray | a part of a line that begins at one endpoint and extends forever in only one direction |
| angle | a figure formed by 2 rays that meet at a common endpoint |
| right angle | an angle that forms a square corner and measusres 90 degrees |
| acute angle | an angle that has a measure less than a right angle |
| obtuse angle | an angle that has a measure greater than a right angle |
| vertex (vertices) | the point at which 2 rays of an angle, 2 or more line segments of a plane figure, or 3 or more sides of a solid (3d) figure meet |
| parallel lines | lines that are side-by-side and stay exactly the same distance apart |
| intersecting lines | two lines that cross at exactly one point |
| perpendicular lines | two lines that intersect to form four right angles |
| ordered pair | a pair of numbers used to locate a point on a grid. The first number tells the left-right position and the second number tells the up-down position |
| reflection | the result of a figure flipped over a line |
| rotation | the action of turning a figure around a point or a vertex |
| translation | the action of sliding a figure in any direction |
| hexagon | a polygon with 6 sides and 6 angles |
| pentagon | a polygon with 5 sides and 5 angles |
| octagon | a polygon with 8 sides and 8 angles |
| quadrilateral | a polyon with 4 sides and 4 angles |
| polygon | a closed plane figure with straight sides |
| congruent | same size and same shape |
| line of symmetry | a line on which a figure can be folded so that its 2 parts are identical |
| edge | the line segment where 2 faces of a solid figure meet |
| face | a flat surface of a solid figure |
| interval | the distance between 2 numbers on the scale of a graph |
| range | the difference between the greatest and least numbers in a set of data |
| volume | the measure of the space a solid figure occupies |
| Grouping Property of Addition | the property which states that the way addends are grouped does not change the sum |
| Grouping Property of Multipliation | the property which states that the way factors are grouped does not change the product |
| Order Property of Multiplication | the property which states that when the order of two factors is changed, the product is the same |
| Property of One for Multiplication | the property which states that the product of any number and 1 is that number |
| square | a polygon with 4 equal sides and 4 right angles |
| rectangle | a polygon with 4 sides and 4 right angles |
| triangle | a polygon with 3 sides and 3 angles |
