| A | B |
|---|
| Subtraction | an operation (type of math) that tells the difference, when some or all are taken away from a total |
| difference | the answer to a subtraction problem |
| subtraction sentence | a number sentence in which one number is taken away from another number |
| estimate | a number close to another number |
| inverse operations | two operations (types of math) that can undo each other, such as addition and subtraction |
| sum | the answer to an addition problem |
| regroup | to rename a number using place value. 1 flat = 10 rods |
| place value | the value a number has because of its place in a number |
