November 20th Spiral Review

Front

What is expanded notation?

Back

Expanded notation is a way of writing numbers to show the value of each digit. For example, the number 326 can be written as (3 x 100) + (2 x 20) + (6 x 1).

Front

How do you convert expanded notation to a numeral?

Back

To convert expanded notation to a numeral, add the values together. For example, (3 x 10) + (2 x 1) + (6 x 0.1) + (4 x 0.01) + (8 x 0.001) equals 32.648.

Front

What is a prime number?

Back

A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself. For example, 5 is prime because its only factors are 1 and 5.

Front

What is a composite number?

Back

A composite number is a natural number greater than 1 that has more than two positive divisors. For example, 4 is composite because it has factors 1, 2, and 4.

Front

How do you round a number to the nearest tenth?

Back

To round a number to the nearest tenth, look at the hundredths place. If it is 5 or greater, round up. If it is less than 5, round down. For example, 23.542 rounds to 23.5.

Front

What is the formula to find the cost of one item?

Back

To find the cost of one item, divide the total cost by the number of items. For example, if Alina raised $95.70 to buy 15 books, each book costs $6.38.

Front

How do you calculate change from a purchase?

Back

To calculate change, subtract the total cost from the amount paid. For example, if Taylar paid $20 for a $3.55 frappuccino, her change is $16.45.

Front

What is the value of the digit in the tenths place in the number 32.648?

Back

The value of the digit in the tenths place in 32.648 is 6.

Front

What does it mean to round a number?

Back

Rounding a number means adjusting it to a nearby value that is simpler or more convenient, often to a specified place value.

Front

What is the difference between a factor and a multiple?

Back

A factor is a number that divides another number evenly, while a multiple is the result of multiplying a number by an integer.