Adding Rational Numbers

What is the sum of -40 and 15.05?

• -24.95

• -25.05

• -23.95

• -26.05

What is a rational number?

• A number that can be expressed as the quotient of two integers, where the denominator is not zero.

• A number that cannot be expressed as a fraction.

• A number that is always an integer.

• A number that has a non-repeating decimal representation.

How do you add two rational numbers with different signs?

• Add the two numbers directly and keep the sign of the larger number.

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

• Multiply the two numbers and take the absolute value of the result.

• Add the absolute values of both numbers and ignore the signs.

What is the sum of -5 and 3?

• -1

• -2

• 1

• 2

What is the rule for adding two negative rational numbers?

• Add their absolute values together and keep the negative sign.

• Add the numbers together and keep the positive sign.

• Subtract the smaller absolute value from the larger and keep the negative sign.

• Multiply the absolute values and keep the negative sign.

What is the sum of 0 and any rational number?

• The sum is the same rational number.

• The sum is always zero.

• The sum is a whole number.

• The sum is an irrational number.

What happens when you add a positive number to a negative number?

• The result is always positive.

• The result is always negative.

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

• The result is zero.

How can you visualize adding rational numbers on a number line?

• You can start at the first number and move to the right for positive numbers or to the left for negative numbers to find the sum.

• You can add the numbers directly without using a number line.

• You can only visualize adding whole numbers on a number line.

• You can visualize adding rational numbers by drawing a circle around them.

What is the rule for adding two positive rational numbers?

• Add their absolute values together.

• Multiply their absolute values together.

• Subtract the smaller number from the larger number.

• Add the larger number to the smaller number.

What is the sum of -8.5 and 2.5?

• -5.0

• -6.0

• -7.0

• -8.0