Funny Math Numbers

Introduction to algebraic expressions worksheets:

Algebra is a branch of the mathematics is use to construct the mathematical model of the real-world situations and to handle a problems that we do not solve the problems using the simple arithmetic. Using words, algebra uses a symbol to make statements.

Algebra is includes real numbers, complex numbers, linear equations, vectors etc. In algebra, we are often using the letters for represents the numbers in mathematics. Algebra is using the symbols as the arithmetic operations for adding, subtracting, dividing and multiplying. In this article we shall discuss about pre algebra worksheets.

Sample Problem for Pre Algebra Worksheets:

Pre algebra worksheet problem:
Example:
The average of a list of 20 numbers is 80. If we are reducing one numbers, the average of the remaining numbers is 108. What is the number that was removed?
Solution:
Step 1: The removed number to be obtained by the difference between the sum of original 20 numbers and the sum of remaining 18 numbers i.e algebra expressions .
Sum of original 20 numbers – sum of remaining 18 numbers
Step 2: Using the formula
Sum of Terms=Average*number of Terms
Sum of original 20 numbers = 80 × 20 = 1600
sum of remaining 18 numbers = 108× 18 = 1944
Step 3: Using the formula from step 1 we get
Removed Number = sum of the original 20 numbers – sum of remaining 18 numbers
1600 – 1944 = -344 Need help with algebra-1-help’s posterous
Answer: The number removed is -344.