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
They can be used to simplify expressions so that the solutions can be found more easily.
I think it is important because you need to know it when you get older.
we use algebraic expressions:for teachingfor cost computingin groceriesfor project evaluationsfor engineeringin architecturein mathematicsin banksfor billingfor manufacturing