its makes it easier because its been seprated by each properties
So you don't have to use mental math or fingers
GIMME THE ANSWER
how to do mental math useing propertys
You
you answer it!
fcbgf
Basically, it means to add the numbers in your head.
Mathematics
Tables use lines and numbers instead of using bars words and numbers..... :) Also, you can't put your beer down on a bar graph :-)
The study of the measurement, properties, and relationships of quantities and sets, using numbers and symbols.
No difference. Both require you to think it out rather than write it out.
We learn math using numbers because that is math. Also when you get to a higher level in math it is easier to use numbers to write 4,137,985,034.152 than splleing it out.