Exploring the Addition of Rational Numbers

Which of the following is a rational number?

• 0.75

• π

• e

• √2

What is the first step in adding mixed numbers?

• Find a common denominator

• Convert them to improper fractions

• Subtract the smaller number from the larger one

• Add the whole numbers first

How do you convert 1 and 2/3 to an improper fraction?

• 1/3

• 2/3

• 3/5

• 5/3

What is the common denominator for 2 and 3?

• 5

• 6

• 3

• 2

When adding fractions with different signs, what should you do?

• Add the numerators directly

• Divide the numerators

• Subtract the smaller numerator from the larger one

• Multiply the numerators

What is the result of adding -4.5 and 1.67?

• -6.17

• 2.83

• -2.83

• -2.83

How do you handle the signs when adding 14.62 and -19.3?

• Add the numbers and keep the negative sign

• Subtract the smaller number from the larger one and keep the sign of the larger number

• Add the numbers and keep the positive sign

• Subtract the smaller number from the larger one and keep the sign of the smaller number

What is the common denominator for 4/15 and 3/10?

• 15

• 10

• 30

• 20

What is the result of adding -4/15 and -3/10?

• -17/30

• -7/25

• 17/30

• -7/30

If the water level is 1.75 meters below normal and falls another 2.5 meters, what is the new water level?

• -2.5 meters

• -1.75 meters

• 4.25 meters

• -4.25 meters