Expression is an algebraic or mathematical statement involves numbers,one or more variables and the operation symbols like +,-, x ,÷.
Look at the flash cards below.They show the mathematical equations for different statements.
Example using addition:
A boy is purchasing 2 pencils and 5 erasers with cost of $ 30. Construct the equation for this case.
Now we are going to take the variable x as cost of 1 pencil and y as the cost of 1 eraser. So the required equation is 2x + 5y = 30
Example using subtraction:
In a two digit number the difference of the digits of a number is 5. Construct the a equation for this case.
Now we are going to take the two digit number be "xy". Here the difference of two digit number is 5. So we can form the equations as x - y = 5.
Example using multiplication:
Example using division:
Here are the some examples of writing statement.
Rewrite the following as a algebraic equation.
1. The product of x and y is "xy"
2. The sum of m and n is " m + n "
3. Five less than x is "x-5"
4. The sum of x,y and 5 times z is "x + y + 5z"
5. The difference between a and the product of b and c is " a - bc "
Definition of variable
A letter used in a mathematical statement to represent a number is called a variable.
In these statements "x" is the variable let us consider the examples "x + 5",12x, x³/2.
An algebraic or mathematical-equation involves numbers, one or more variables and the operations symbols like + , -, x or ÷
The + and - signs in an algebraic statements separate it into terms.
Here are the two practice worksheets on the topic. Students need to practice this kind of question to form a expression from the statement. This is the most important part to students who are struggling to face a word problem.
“Mathematics, without this we can do nothing in our life. Each and everything around us is math.
Math is not only solving problems and finding solutions and it is also doing many things in our day to day life. They are:
It subtracts sadness and adds happiness in our life.
It divides sorrow and multiplies forgiveness and love.
Some people would not be able accept that the subject Math is easy to understand. That is because; they are unable to realize how the life is complicated. The problems in the subject Math are easier to solve than the problems in our real life. When we people are able to solve all the problems in the complicated life, why can we not solve the simple math problems?
Many people think that the subject math is always complicated and it exists to make things from simple to complicate. But the real existence of the subject math is to make things from complicate to simple.”