write an algebraic expression representing three less than half a number

let n = number

half the number, so n/2
three less than, so - 3
putting them together, three less than half a number is:
n/2 - 3

hope this helps~ :)

To represent "three less than half a number" as an algebraic expression, you can follow these steps:

1. Choose a variable to represent the unknown number. Let's use "x" as the variable.

2. Take half of the number by dividing it by 2. This can be done by multiplying the number by 1/2 or by using the division operator "/2".

Half of the number is represented as "x/2".

3. Subtract three from the result obtained in step 2. You can do this by subtracting 3 from the expression "x/2".

So, the algebraic expression representing "three less than half a number" would be (x/2) - 3.