Adding and Subtracting Rational Decimals Flashcard

Front

What is a rational decimal?

Back

A rational decimal is a decimal number that can be expressed as a fraction, where both the numerator and the denominator are integers.

Front

How do you add decimals with the same sign?

Back

When adding decimals with the same sign, you add their absolute values and keep the common sign.

Front

How do you add decimals with different signs?

Back

When adding decimals with different signs, subtract the smaller absolute value from the larger absolute value and take the sign of the larger number.

Front

What is the result of 34.5 + (-7)?

Back

27.5

Front

What is the result of -6.25 + 7?

Back

0.75

Front

What is the result of -51 + 81.623?

Back

30.623

Front

What is the value of the expression -3.2 + 5 - 8?

Back

-6.2

Front

What is the first step in adding or subtracting decimals?

Back

Align the decimal points of the numbers before performing the operation.

Front

What does it mean to take the sign of the larger number when adding decimals with different signs?

Back

It means that after subtracting the smaller absolute value from the larger one, the result will have the same sign as the number with the larger absolute value.

Front

What is the sum of 0.5 and -0.3?

Back

0.2