Halve — Definition, Formula & Examples
Halve means to divide a number into two equal parts. When you halve a number, you split it in half, which is the same as dividing by 2.
To halve a quantity is to multiply it by , or equivalently, to divide it by 2, producing a result exactly half the original value.
Key Formula
Where:
- = The number you want to halve
How It Works
To halve any number, divide it by 2. For even numbers like 8, this gives a whole number: . For odd numbers like 7, you get a decimal or fraction: . Halving is the opposite of doubling. If you double 6 to get 12, then halving 12 brings you back to 6.
Worked Example
Problem: A recipe calls for 16 cups of flour, but you only want to make half the recipe. How many cups of flour do you need?
Step 1: Halve means divide by 2.
Step 2: Perform the division.
Answer: You need 8 cups of flour.
Why It Matters
Halving shows up whenever you share something equally between two people or cut a recipe in half. It also builds a foundation for understanding fractions, since finding half of a number is your first step into working with .
Common Mistakes
Mistake: Confusing halving with subtracting 2.
Correction: Halving means dividing by 2, not subtracting 2. Half of 10 is 5 (not 8).