Add and subtract 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

How do you add two rational numbers with the same sign?

Back

Add their absolute values and keep the sign.

Front

How do you add two rational numbers with different signs?

Back

Subtract the smaller absolute value from the larger absolute value and keep the sign of the number with the larger absolute value.

Front

What is the absolute value of a number?

Back

The absolute value of a number is its distance from zero on the number line, regardless of direction.

Front

What does it mean to subtract a rational number?

Back

Subtracting a rational number is the same as adding its opposite.

Front

What is the result of adding -3 and 5?

Back

The result is 2.

Front

What is the result of adding -4.5 and -2.5?

Back

The result is -7.

Front

If the temperature is -4.5°C and it rises by 7.5°C, what is the new temperature?

Back

The new temperature is 3°C.

Front

What is the distance between -2 and 2 on the number line?

Back

The distance is 4, calculated as |2 - (-2)| = |2 + 2| = 4.

Front

What is the result of subtracting -3 from 2?

Back

The result is 5.