Describe how you can use the make a ten strategy to find sum 7+9

Okay.  Let's pretend that you have 9 toy cars.  You love these toy cars, so your parent get's you 7 more toy cars.  You're really excited now, and you're counting how many you have by putting them into a pile of 7 and a pile of 9.  You do so by taking one of the 7 cars away from the 7 pile, and you add it to the 9 pile.  Now you have a pile of 10 cars, and a pile of 6 cars.  Now, you just add the 6 to the 10, and you have 16 cars.  This strategy is pretty simple, and extremely helpful.  :D  Although, I've never heard of doing math like this before, so this was something I had to look up before I actually gave you an answer.  If you need more information, just tell me and I'll give the information to you.  Otherwise, if I don't, please remove my answer so no one else get's the wrong answer.  :D