UIL Number Sense

Front

What is the formula for the sum of the first n natural numbers?

Back

The sum of the first n natural numbers is given by the formula S = n(n + 1)/2.

Front

How do you calculate the product of two numbers?

Back

To calculate the product of two numbers, multiply them together using the multiplication operation.

Front

What is the expanded form of a number?

Back

The expanded form of a number expresses it as the sum of each digit multiplied by its place value.

Front

How do you round a number to the nearest thousand?

Back

To round a number to the nearest thousand, look at the hundreds digit. If it is 5 or more, round up; if it is less than 5, round down.

Front

What is the result of multiplying any number by zero?

Back

The result of multiplying any number by zero is always zero.

Front

What is the associative property of multiplication?

Back

The associative property of multiplication states that the way in which numbers are grouped in multiplication does not change the product.

Front

What is the commutative property of addition?

Back

The commutative property of addition states that changing the order of the addends does not change the sum.

Front

What is the value of 11 squared?

Back

The value of 11 squared (11 x 11) is 121.

Front

How do you express a number in scientific notation?

Back

A number is expressed in scientific notation as a product of a number between 1 and 10 and a power of 10.

Front

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

Back

A prime number has exactly two distinct positive divisors: 1 and itself, while a composite number has more than two positive divisors.