subject: Introduction Of Pre Algebra Problem Solver : [print this page] Pre algebra is one of the important branch in mathematics .Pre Algebra includes various terms like variables, constants, coefficients, terms, expressions, equations, fractions, etc. Through the solver we can get instant and step by step clear answers to the pre-algebra problems. Let us solve some examples that will be helpful to understand the concepts in pre algebra problem solver
Example Problems for Pre Algebra Problem Solver :
Problem : 1
Identify which of the following that contains expressions and terms and give their numerical coefficients too:
xyz + 4, 13 xy^2, 13 yz + 5y^2z, 4p^2q r 3pq^2 r+ 5
Sol :
In each expression look for a terms which are not constants and the remaining part of that terms are the coefficient of the expression.
Expression Term Co efficient
1 xyz + 4 xyz 1
2 13 xy^2 xy2 1
3 13 yz + 5y^2z yz ,5y2z 1,5
4 4p^2q r 3pq^2 r + 5 4p^2q r,-3pq2 4,-3
Problem 2:
In a kids school there are 600 students. Now if " '3/4' of the students are absent ", Find the total number of students present in the school.
Sol :
Here we get the solution
600 * ('3/4' ) = 450 students are absent and
600 - 450 = 150 are present
Now just compute the ratio of the remaining 150 students to the total of 600 to get
' 150 / 600' = '1/4'
which is the fraction got.
Therefore, one fourth of the students are present today to the school.
Problem : 3
How many prime numbers are exactly divisible by six?
Sol :
Remember the prime numbers are the number which will divide by 1 and by its own number itself. So that 6 is not a prime number.
So that there are no prime numbers that are divisible by 6, because 6 is not a prime number.
these are the solved example problems for pre algebra problem solver
Practice Problems for Pre Algebra Problem Solver :
Practice problem 1 Identify which of the following that contains expressions, terms.
4x 3y, 8 x + y, y^2x y, 2z 5xz
Ans : 4x 3y 4x , -3y
8 x + y x , y
y^2x y y^2x, -y
2z 5xz 5xz, 2z
Practice problem 2: In a company there are 900 workers working. Now " '1/3 ' of the workers have taken leave ", Find the total number of workers working in the company at present.
Ans : '2 / 3 '
Introduction to experimental method definition:
In mathematics the experimental method definition concept has been given as an exact meaning in probability theory that is used extensively in such areas of study as mathematics, statistics, finance, gambling, science, and philosophy to draw conclusions about the likelihood of potential events and the underlying mechanics of complex systems. Now let us see about the experimental method definition problems.(Source in wikipedia ).
Problems in Experimental Definition Method 1:
Ex 1:
A coin is tossed 60 times. 30 times head appear. Find the experimental probability of getting heads.
Sol:
Step 1:
Experimental method probability = number of times the event happen / total number of trials.
Step 2:
Number of times heads appeared = 30.
Step 3:
Total number of experiments = 60.
Step 4:
Therefore experimental probability of getting a head = 30/60= 0.5
