| A | B |
|---|
| add | To join two or more numbers or quantities to get one number |
| addends | Any of the numbers that are added |
| associative property of addition | The property that states no matter how the numbers are grouped, the answer will always be the same Ex: (2+3)+4=2+(3+4) |
| bar graphs | A graph that uses bars of different heights or lengths to show data |
| commutative property of addition | The property that states numbers may be added together in any order, and that it will not change the sum Ex:4+3 = 3+4 |
| digit | The ten symbols: 0,1,2,3,4,5,6,7,8,9 |
| equation | A statement that two amounts have equal value or measure |
| fact family | A group of related facts based on one fact |
| perimeter | The distance around a figure |
| sum | The total of two or more numbers being added |
| congruent | Having the same size or shape |
| decrease | To make an amount smaller |
| difference | The amount you have left after you have subtracted one number from another |
| estimate | To make an approximate or rough calculation, often based on rounding |
| greater than | A symbol (>) used to show that one number is larger than another number |
| increase | To make greater or become larger |
| less than | A symbol (<) used to compare two numbers with the lesser number given first |
| line of symmetry | A line that divides a figure into two halves that are exactly alike |
| minuend | The quantity from which another quantity is to be subtracted |
| subtrahend | The second number in a subtraction sentence, the number being subtracted |
