math rant

I was doing some work the other day and needed to print off the last few pages of a PDF I'd made. So I looked at the page number I was on (35) and the ending page (39), and realized I was getting the wrong answer when I tried to figure out how many pages to print. I think 5+4=9, right? So I'd print 4 pages.
Except I needed to print 5.

This is one of the reasons I want to homeschool. Because I actually did very well in math in school (honors/AP classes, an A in the calculus class I took in college), and I still cannot COUNT and do BASIC ADDITION.
Something very basic about numbers never got lodged in my brain, and I still have this sense that when I use math, I am not walking on firm ground. There are holes in my comprehension, despite the As and the completion of courses, that plauge me. And I never know when I'm going to fall into one.

I would like more than that for my daughters. Despite the math books and my parent's paying attention to which teachers I got, and hiring tutors when I was struggling early on, and my own efforts (taking calculus was not required) I still don't feel like I GET math.

I'd like to figure out how to get my daughters that comprehension, even if they miss the calculus. Because honestly, if they have the number sense, I have a feeling they could figure out the calculus if they needed it.