Quote:
Originally Posted by Nancy1999  Back in the olden days we were taught to do the insides of parenthesis first, and then do what ever it takes to get rid of parenthesis. In other words, add 9+3 first and you still have parenthesis.
48÷2(12)
In order to get rid of that parenthesis you have to multiply, after you multiply, you can get rid of parenthesis and you have a problem that can be worked from left to right.
48 ÷ 24
Do they still teach that rule about parenthesis? |
This is what it says in Prentice Hall Algebra book:
1. Perform any operation inside grouping symbols
2. Simplify the powers
3. Multiply and Divide in order from left to right.
4. Add and subtract in order from left to right.
To me, this is saying once the 9 + 3 happens then what is left is considered multiplication. The two is distributive property which in reality is multiplication. Again, I think it is how you set it up. To be honest, I can see it both ways, 2 and 288. I think I need to email one of my old college professors!!
It would be interesting to see what they say!!