Hello Year 9 and welcome to your pages.
There will be more to come, but for now, think about this.....
123456789 = 100
Puzzle: Can you make the numbers 123456789 add up to 100, by inserting any of these arithmetic operations (+ - * /) into the string of numbers (and keeping the numbers in the above order). I've seen this in a book somewhere, and I think the book gave only one solution. You might want to try it.