using 2 times tables to solve 4 times tables.

I was learning to use my 2 times tables to solve 4 times tables. An example of this is: 4x12= 48. I solved it by making it into 2x12, which of course is 24, then I x2 on that, so the answer is 48. It is a strategy I would use again. I got one question wrong, which is 44x4. I did 2x44, which is 88, but I got the next part wrong. I did x2 which I wrote as 116. The real answer is 176, but I see where I went wrong. I should of done 80 + 80, 160, and then 8 + 8 = 16, then add them together, which is 176. I might need a little more practise on the bigger numbers, but I will probably pick it up very quick.