I don't really know how to explain it to you but what I can tell you is that in 1 centigram there are 10 milligrams.
Do the BODMAS rule
Bracket
operation
division
multiplication
addition
substraction
12 / 6 = 2
2 + 4 = 6
6 / 3 = 2
so the answer is 2
Try to find ways that you can easily remember formulas. For example, when you find the line of symmetry the equation is y=-b/2a. A way you can remember that is by saying negative tuba. It seems silly but it’s something you can do for most equations so it doesn’t seem so intimidating.
For 27,the temp and time increase