It's important that you can recognize subtraction problems. when a negative number is being subtracted, it goes inside parentheses. The subtraction sign is read as minus.
even though the same symbol ‘−’ is used both for subtraction and for finding the opposite of a number,
it is read in different ways
HOW TO SUBTRACT A NUMBER:
To subtract a number, you add its opposite.
To subtract 3, you add −3
To subtract −3, you add 3
THREE STEPS IN A SUBTRACTION PROBLEM:
There are three steps in a subtraction problem.
These steps are illustrated using this example:
−3−(−5)
This article was originally published on The Tree Of Math. Read the original article.
Source:
http://www.onemathematicalcat.org/algebra_book/online_problems/sub_signed.htm
subtraction sign
a negative number like ‘−3’ is read as negative threeeven though the same symbol ‘−’ is used both for subtraction and for finding the opposite of a number,
it is read in different ways
HOW TO SUBTRACT A NUMBER:
To subtract a number, you add its opposite.
To subtract 3, you add −3
To subtract −3, you add 3
THREE STEPS IN A SUBTRACTION PROBLEM:
There are three steps in a subtraction problem.
These steps are illustrated using this example:
−3−(−5)
- Identify the number being subtracted. Answer: −5
- Find the opposite of the number being subtracted. Answer: the opposite of −5 is 5
- Rewrite the subtraction problem as addition of the opposite. Answer: −3−(−5)=−3+5=2−3−(−5) =−3+5 =2
This article was originally published on The Tree Of Math. Read the original article.
http://www.onemathematicalcat.org/algebra_book/online_problems/sub_signed.htm
