(2+6)-2+1=7, because what you're doing is essentially this: (8)-2+1, which is 6+1, which equals 7.
(10-6)+1-4=1. Similar to the above problem, figure out the parenthesis first: (10-6)=4. Then, the problem becomes (4)+1-4, which is 5-4, which equals 1.
The correct phrase is "order of operations," because you are learning what order to perform matematical operations: first work out any of the parenthesis, then perform any division or multiplication, then add and substract.
(2+6)-2+1=7, because what you're doing is essentially this: (8)-2+1, which is 6+1, which equals 7.
ReplyDelete(10-6)+1-4=1. Similar to the above problem, figure out the parenthesis first: (10-6)=4.
Then, the problem becomes (4)+1-4, which is 5-4, which equals 1.
The correct phrase is "order of operations," because you are learning what order to perform matematical operations: first work out any of the parenthesis, then perform any division or multiplication, then add and substract.
Good luck. :-)