subtract
part of speech
verb (subtract, subtracts, subtracted, subtracting); noun subtraction
meaning for a pupil
1) To subtract is to take one number away from another to find what is left or the difference. tree →
2) To subtract something can also mean to take it away from a group or an amount. tree →
sense in the lessons
the operation − (minus): we subtract when things go away (give, lose, eat, break, left) and to find a difference (how many more, how much older); in everyday life we subtract to find change from money or time still to wait; phrases: «subtract 5 from 12», «take away»
examples
- Student: I subtract: 6 (because of «give», «left»). tree →
- Subtract 5 from 12. tree →
- We subtract to find how many more Tom has than Ben. tree →
- If you subtract 3 from 10, you get 7. tree →
- Mum subtracted the cost of the milk from 20 dollars to find her change. tree →
- To check a subtraction, add the answer to the smaller number. tree →
- The coach subtracted one point for a foul. tree →
- Subtraction is the opposite of addition. tree →
note
Names the operation itself. Subtract when things go away or to find a difference; trap: «subtract 5 from 12» is 12 − 5, not 5 − 12. The answer of a subtraction is called the difference. Adding undoes subtracting.
In the corpora
- Between two AD years, subtract.
- Before you add or subtract, say in words what each number counts.
- Then decide whether to add or subtract.
- Each capture takes one piece off the board, so subtract all the captures of both players from 32.
Trees and pragmatics
Every meaning and example of «subtract» parsed by Mova, each sentence with its dependency tree and frames.