Unit 3: Operations & Numerical Expressions Flashcard

Front

What is the order of operations in mathematics?

Back

The order of operations is a set of rules that determines the sequence in which calculations are performed. The acronym PEMDAS helps remember the order: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

Front

What does the term 'expression' mean in mathematics?

Back

An expression is a combination of numbers, variables, and operators (such as +, -, ×, ÷) that represents a value. It does not include an equals sign.

Front

What is a numerical expression?

Back

A numerical expression is a mathematical phrase that includes numbers and operations but does not have an equality sign. For example, 3 + 5 or 12 ÷ 4.

Front

How do you evaluate the expression 15 + (45 ÷ 5) x 4?

Back

First, divide 45 by 5 to get 9. Then multiply 9 by 4 to get 36. Finally, add 15 to 36 to get 51.

Front

What is the total number of apples in 20 bins if each bin has 25 red apples and 30 green apples?

Back

You can find the total by using the expression 20 x (25 + 30). This equals 20 x 55 = 1100 apples.

Front

How do you find the total number of trading cards Aidan has after giving some away?

Back

You can use the expression (8 x 12) - 4. First, calculate 8 x 12 to get 96, then subtract 4 to find that Aidan has 92 cards left.

Front

What does the phrase 'the sum of ten and three, then doubled' represent mathematically?

Back

It represents the expression (10 + 3) x 2.

Front

What does the phrase 'the difference of ten and three, then add 2' represent mathematically?

Back

It represents the expression (10 - 3) + 2.

Front

What is the result of the expression (10 + 3) x 2?

Back

The result is 26. First, add 10 and 3 to get 13, then multiply by 2.

Front

What is the result of the expression (10 - 3) + 2?

Back

The result is 9. First, subtract 3 from 10 to get 7, then add 2.