Operations with Rational Numbers

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

• The result is always positive.

• The result depends on the absolute values.

• The result is always negative.

• The result is zero.

What is the sum of two negative numbers? Give an example.

• The sum is positive. Example: -3 + (-2) = 1.

• The sum is zero. Example: -3 + (-3) = 0.

• The sum is negative. Example: -3 + (-2) = -5.

• The sum is undefined. Example: -3 + (-2) = ?.

What is -7 - 2?

• -5

• -7

• -9

• -4

What is the result of -4 + 6?

• 0

• 1

• 2

• 3

What is the absolute value of -7?

• -7

• 0

• 7

• -1

What is the rule for dividing two numbers with the same sign?

• The result is negative. Example: -8 ÷ -2 = -4.

• The result is positive. Example: -8 ÷ -2 = 4.

• The result is zero. Example: -8 ÷ -2 = 0.

• The result is undefined. Example: -8 ÷ -2 = ?.

How do you convert a fraction to a decimal?

• Multiply the numerator by the denominator.

• Add the numerator and denominator together.

• Divide the numerator by the denominator.

• Subtract the denominator from the numerator.

What is the rule for dividing two numbers with different signs?

• The result is positive. Example: 8 ÷ -2 = 4.

• The result is negative. Example: 8 ÷ -2 = -4.

• The result is zero. Example: 8 ÷ -2 = 0.

• The result is undefined. Example: 8 ÷ -2 = NaN.

What is -9 + (-5)?

• -10

• -12

• -14

• -16

What is the product of -5 and -2?

• -10

• 0

• 5

• 10