Subtracting Rational Numbers

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 does it mean to subtract a negative number?

Back

Subtracting a negative number is the same as adding its positive counterpart. For example, a - (-b) = a + b.

Front

What is the result of -7 - 8?

Back

-15

Front

How do you simplify -4 - (-2)?

Back

-4 + 2 = -2.

Front

What is the temperature at midnight if it drops from 15 degrees by 30 degrees?

Back

-15 degrees.

Front

What is the result of -8.24 - 6.59?

Back

-14.83.

Front

How do you calculate -12.45 - (-206.3)?

Back

-12.45 + 206.3 = 193.85.

Front

What is the rule for subtracting two rational numbers?

Back

To subtract two rational numbers, you can add the first number to the opposite of the second number.

Front

What is the equivalent expression for -7 - 8?

Back

-7 + (-8).

Front

What does it mean for two expressions to be equivalent?

Back

Two expressions are equivalent if they have the same value when evaluated.