First Semester Review

Front

What is a composite number?

Back

A composite number is a whole number greater than 1 that has more than two distinct positive divisors, meaning it can be divided evenly by numbers other than 1 and itself. For example, 4, 6, and 8 are composite numbers.

Front

How do you find out how many pages Ken needed for his stickers if he had 235 stickers and put 4 stickers on each page?

Back

To find the number of pages, divide the total number of stickers by the number of stickers per page: 235 ÷ 4 = 58.75. Since he can't have a fraction of a page, he needs 59 pages.

Front

How much will Ernie have donated to charity after 6 years if he donates $3,176 per year?

Back

To find the total donation after 6 years, multiply the annual donation by the number of years: $3,176 × 6 = $19,056.

Front

What does it mean when we say 24,590 > 23,890?

Back

It means that 24,590 is greater than 23,890. This is true because the thousands place shows that 24,590 has 4,000 more than 23,890.

Front

How many people were sitting in the first 15 rows of a concert if there were 9 people in each row?

Back

To find the total number of people, multiply the number of rows by the number of people per row: 15 × 9 = 135.

Front

What is the definition of division?

Back

Division is the process of determining how many times one number is contained within another. It is one of the four basic operations of arithmetic.

Front

What is the difference between a prime number and a composite number?

Back

A prime number is a whole number greater than 1 that has exactly two distinct positive divisors: 1 and itself. A composite number has more than two divisors.

Front

How do you compare two numbers to determine which is greater?

Back

To compare two numbers, look at their digits starting from the leftmost side. The first digit that differs determines which number is greater.

Front

What is multiplication?

Back

Multiplication is a mathematical operation where a number is added to itself a certain number of times. For example, 3 × 4 means adding 3 four times: 3 + 3 + 3 + 3 = 12.

Front

What is the purpose of using parentheses in math?

Back

Parentheses are used to indicate which operations should be performed first in a mathematical expression.