MCA Review #4 Numbers and Operations

Front

What are consecutive numbers?

Back

Consecutive numbers are numbers that follow each other in order, without any gaps. For example, 4 and 5, or 6 and 7.

Front

What is a rational number?

Back

A rational number is any number that can be expressed as a fraction or a decimal that either terminates or repeats.

Front

What is an irrational number?

Back

An irrational number is a number that cannot be expressed as a simple fraction; its decimal representation goes on forever without repeating.

Front

What does PEMDAS stand for?

Back

PEMDAS stands for Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right). It is the order of operations used to solve mathematical expressions.

Front

How do you solve an expression using PEMDAS?

Back

Follow the order of operations: first solve anything in parentheses, then exponents, followed by multiplication and division from left to right, and finally addition and subtraction from left to right.

Front

What is the result of 3 + 5 × 2 using PEMDAS?

Back

The result is 13. First, multiply 5 × 2 = 10, then add 3 + 10 = 13.

Front

What is the result of (8 - 3) × 2?

Back

The result is 10. First, solve the parentheses: 8 - 3 = 5, then multiply: 5 × 2 = 10.

Front

What is a terminating decimal?

Back

A terminating decimal is a decimal that has a finite number of digits after the decimal point, such as 0.75 or 2.5.

Front

What is a repeating decimal?

Back

A repeating decimal is a decimal that has one or more digits that repeat infinitely, such as 0.333... or 1.666... .

Front

Can you give an example of a rational number?

Back

An example of a rational number is 1/2 or 0.75.