Subtracting Whole Numbers.
Subtraction means take away (it is opposite of addition). The answer in a subtraction problem is called the difference. Subtrahend is the number to be subtracted from another number (the minuend) minuend – subtrahend = difference
To find the difference between two numbers, sometimes you need to regroup, or borrow, from another number. Example:
When the digit in the subtrahend is larger, decompose 1 unit of higher value into 10 units of the next lower value, and regroup.
Addition and subtraction are opposite operations, so you can use one to check the other. If A + B = C, then C – B = A
Word Problems – Using Whole Numbers
Write your own word problem: