A variable is simply an unknown value. It can be represented by anything else other than numbers (since they won't be variables). For example, a+1 is a variable in an addition expression, b-c is a subtraction expression with two variables. Expressions need not be made up of only 2 items as well. The next line is a single expression as well:
q-w-e-r-t-y-u-i+o+p-a+s+d+f+g-32h+124j+73k-l+z+2x+c+7v-b+4n-8m
To solve an expression that is not simplified, first, combine like terms by identifying and grouping similar variables or constants. Then, apply arithmetic operations (addition, subtraction, multiplication, division) as appropriate to simplify the expression further. If necessary, factor the expression or use algebraic identities to reduce it to a simpler form. Always check your final answer to ensure it is in its simplest possible state.
It is known as BIDMAS (UK) or PEMDAS (US) BIDMAS = Brackets, Index, Division, Multiplication, Addition, Subtraction. or PEMDAS = Parentheses, Exponent, Multiplication, Division, Addition, Subtraction. There is no porder between DM/MD and between AS: Division and multiplication are to be carried out left to right. Addition and subtraction are to be carried out left to right.
because you undo the operation in the equation= to undo subtraction you add
well, if you want to add apples to bananas you can't do that it's the same with variables, the coefficients can be different but to add and subtract the variables have to be the same for ex: you can't do 4x+3y because they have different variables you can do 4x+3x because they have the same variables all you do is add the coefficients and keep the variable so you would get 7x
to come up with the total
that we can use it
it is the number you would use to solve the problem
In mathematics, the order of operations dictates that you perform addition and subtraction in the order they appear from left to right in an expression. This means that you should perform addition before subtraction only if addition comes before subtraction in the expression. If addition and subtraction are next to each other, you would perform them from left to right.
To solve an expression that is not simplified, first, combine like terms by identifying and grouping similar variables or constants. Then, apply arithmetic operations (addition, subtraction, multiplication, division) as appropriate to simplify the expression further. If necessary, factor the expression or use algebraic identities to reduce it to a simpler form. Always check your final answer to ensure it is in its simplest possible state.
You don't. You use the GCF to reduce the answer once the addition or subtraction is complete.
If they are present in the expression you need to use them to evaluate the expression, if they are not, you don't. You would not use any of them - at least not explicitly - to evaluate sqrt[ln(pi)], for example.
It is known as BIDMAS (UK) or PEMDAS (US) BIDMAS = Brackets, Index, Division, Multiplication, Addition, Subtraction. or PEMDAS = Parentheses, Exponent, Multiplication, Division, Addition, Subtraction. There is no porder between DM/MD and between AS: Division and multiplication are to be carried out left to right. Addition and subtraction are to be carried out left to right.
addition subtraction multiplication and division
In addition to his response I vote yes. or I like addition better than subtraction.
because you undo the operation in the equation= to undo subtraction you add
They both include number and they use your head
Basic addition and subtraction mostly.