Second grade math... hard?

I just got done getting my  brother(second grade) to do his math. You've heard(read) my grousing about my math, but that's pre-cal. He was complaining over ADDING! I confess, I showed him my math binder. He just gave it a blank stare. Sure, my glare and shouts(despite my sore throat which is about to choke me now) might have had something to do with his silence, but still. One problem was: '46 = ___ tens + ___ ones = 3 tens + ____ ones.' ... His answer? ' 4 tens + 6 ones = 3 tens + 6 ones.' ... my response to his answer? '... *rawthroated yell of fury* WHAT THE HECK?! HOW DID YOU GET THAT?!' He whimpered. After what felt like thirty minutes and like five different ways of trying to explain the process, he finally gets it. Sighing in relief, I left him to fill out the rest and took my BB gun out side to shoot at whatever. I empty one clip after petting my cat who came to me crying to be pet and then Noise comes easing the door open behind me and shows me the last problem he needed to solve. It was a word problem. I set it up with 133 on top and 48 on bottom with a line underneath, like you'd set up any old addition problem and he solved it just fine. It took him two tries and another clip to get it right in his book. Then, just as I was headed back to my spot on my bed where I sit with my laptop, he says his computer isn't working. I turn off the power strip, wait until the count of ten or so, then switch it all back on. So, I have emptied three clips, shouted myself hoarse(though it was kinda easy considering my cold) and have forbidden Noise from bothering me for an hour, even though he wanted the computer so he could watch a movie. I currently have one earbud playing Irish music, my laptop, and a warm, purring cat. For the next hour, or maybe two hours once I put in his movie, I am happy.