the reason you use letters in algebraic expressions is because you don't know the number so a letter replaces it.
use a calculator
x+x use inverse operations
Numerical Expression: 1.) 20+2-8 ( Or any other number with two symbols on math ) Algebraic Expression: 2.) h x 2 ( Or any other number using only one symbol an a letter ) The difference between a numerical and algebraic expressions is that numerical expressions use only numbers, but algebraic expressions use letters as variables to represent numbers.
2-9h+6-5n use h=3 and n=2
the reason you use letters in algebraic expressions is because you don't know the number so a letter replaces it.
use a calculator
by farting
They both use PEMDAS or Order of Operation
x+x use inverse operations
Shoemaker
Algebraic expressions use letters as variables to represent numbers. Ex. 5c-(2+x) x=2 c=12 Numerical expressions use numbers only. Ex. 12+(2-7)
Numerical Expression: 1.) 20+2-8 ( Or any other number with two symbols on math ) Algebraic Expression: 2.) h x 2 ( Or any other number using only one symbol an a letter ) The difference between a numerical and algebraic expressions is that numerical expressions use only numbers, but algebraic expressions use letters as variables to represent numbers.
2-9h+6-5n use h=3 and n=2
I think it is important because you need to know it when you get older.
They can be used to simplify expressions so that the solutions can be found more easily.
we use algebraic expressions:for teachingfor cost computingin groceriesfor project evaluationsfor engineeringin architecturein mathematicsin banksfor billingfor manufacturing