Unit 5 Rational Number Arithmetic

Front

What is a rational number?

Back

A rational number is any number that can be expressed as the quotient or fraction of two integers, where the denominator is not zero.

Front

What is the sum of two negative numbers?

Back

The sum of two negative numbers is always negative.

Front

What is the result of adding a positive number to a negative number?

Back

The result depends on the absolute values of the numbers. If the positive number is larger, the result is positive; if the negative number is larger, the result is negative.

Front

What is the result of subtracting a negative number from a positive number?

Back

Subtracting a negative number is the same as adding its positive counterpart, so the result will be greater than the original positive number.

Front

What does it mean for a number to be 'zero'?

Back

Zero is the integer that separates positive numbers from negative numbers. It is neither positive nor negative.

Front

What is the result of 2.3 + (-2.3)?

Back

The result is 0.

Front

What is the result of (-3.7) + (-4.1)?

Back

The result is -7.8.

Front

What is the result of 72 - (-100)?

Back

The result is 172.

Front

How do you represent a withdrawal in a bank account?

Back

A withdrawal is represented as a negative number in the account balance.

Front

What is the effect of adding a positive number to a bank account?

Back

Adding a positive number increases the account balance.