When we remove something from a group of things then the process is known as subtraction or deduction. We use minus(-) sign for subtraction.
Example 1:There are 5 stars and if we remove 2 stars from the group of stars, then 3 stars will remain.
Example 2:Subtract 3 from 7
7 - 3 = 4
Example 3:Subtract 4 from 9
9 - 4 = 5
When you subtract zero from any number, then the answer would be same number.
Example:7 - 0 = 7
When we subtract a number from itself, the answer will always be zero.
Example:8 - 8 = 0
Example 1:There are 9 birds on a tree. If 5 birds fly away, then how many are left on the tree?
Number of birds on a tree = 9
Number of birds fly away = 5
So, Number of birds left on tree 9 - 5 = 4
Example 2:There are 12 people on a van. If 2 people got down, then how many people remain in the van?
Number of people on a van = 12
Number of people get down = 2
So, Number of people remain on van 12 - 2 = 10