[expat]

Some of you are mentally challenged if you don't understand that grouping as per the original exercise is completely logical and works for much higher order thinking in more complex tasks later in life.

I honestly am amazed by the lack of intelligence a few of you are demonstrating here. Don't you ever approximate when you go to your local hardware to buy some timber, rubber tubing, paint to cover a wall. That's exactly what the child is doing; approximating and eventually calculating and comparing. I am sure the teacher is not going to check an answer of 360 as being the correct answer for calculating. Its estimating - you know that thing you do when you go to the hardware store.

The initial question was valid - no problems there. It was just clarification that was needed and answered.

The assinine comments about teachers by SammyGspot are typical rantings from him. Best just to ignore. (yes I did mean ss)