Understanding Addition and Subtraction of Rational Numbers

What is a rational number?

• A number that is always negative.

• A number that is always positive.

• A number that cannot be expressed as a fraction.

• A number that can be expressed as a fraction with a non-zero denominator.

When adding two fractions with the same denominator, what should you do?

• Add the denominators and keep the numerators the same.

• Subtract the numerators and keep the denominator the same.

• Add the numerators and keep the denominator the same.

• Multiply the numerators and denominators.

What is the result of adding 2/9 and 3/9?

• 2/3

• 1/9

• 5/9

• 5/18

How do you find the least common multiple (LCM) of two numbers?

• By dividing the larger number by the smaller one.

• By subtracting the smaller number from the larger one.

• By listing the multiples of each number and finding the smallest common one.

• By adding the two numbers.

What is the LCM of 3 and 2?

• 3

• 2

• 6

• 12

What is the result of adding 4/3 and 5/2?

• 23/6

• 9/5

• 19/6

• 8/5

When subtracting two fractions with the same denominator, what should you do?

• Multiply the numerators and denominators.

• Add the numerators and keep the denominator the same.

• Subtract the numerators and keep the denominator the same.

• Subtract the denominators and keep the numerators the same.

What is the result of subtracting 7/3 from 5/3?

• 0

• 3/3

• 1/3

• 2/3

What is the result of subtracting 5/2 from 4/3?

• -7/6

• 7/6

• -1/6

• 1/6

Where should the negative sign be placed in a negative fraction?

• It doesn't matter where it is placed.

• In the numerator only.

• In the denominator only.

• In front of the fraction.