Add and subtract rational numbers

Front

What is the sum of any number and its opposite?

Back

zero

Front

What is the distance between temperatures if the high temperature is 78 degrees and the low temperature is -23 degrees?

Back

101 degrees

Front

Which of the diagrams correctly represents -4 + 5 + (- 2)?

Back

diagram B

Front

What is the distance between -5 and 5 on a number line?

Back

10 units

Front

The temperature was 3°C on Monday and was 7.5 degrees lower the next day. What was the temperature on Tuesday?

Back

-4.5°C

Front

Define rational numbers.

Back

Rational numbers are numbers that can be expressed as a fraction of two integers, where the denominator is not zero.

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

How do you add two rational numbers with different signs?

Back

Subtract the absolute values and take the sign of the number with the larger absolute value.

Front

What is the rule for subtracting rational numbers?

Back

To subtract a rational number, add its opposite.

Front

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

Back

The result depends on the absolute values; if the positive number is larger, the result is positive, and vice versa.