Adding and Subtracting Rational Numbers: Key Concepts

What is the result of adding 1/5 and 2/5?

• 1/5

• 3/5

• 2/5

• 4/5

How do you subtract 3 and 3/9 from 5 and 8/9?

• 3 and 3/9

• 3 and 5/9

• 2 and 3/9

• 2 and 5/9

What is the first step in adding fractions with unlike denominators?

• Subtract the denominators

• Simplify the fractions

• Find a common denominator

• Add the numerators

What is the common denominator for 1/3 and 2/5?

• 10

• 5

• 15

• 3

How do you convert a mixed number to an improper fraction?

• Multiply the whole number by the denominator and add the numerator

• Add the numerator and denominator

• Subtract the numerator from the denominator

• Divide the numerator by the denominator

What is 2 and 1/6 as an improper fraction?

• 14/6

• 13/6

• 12/6

• 11/6

What is the result of subtracting 21/5 from 65/10?

• 23/10

• 21/10

• 22/10

• 24/10

What is the rule for adding and subtracting decimals?

• Align the whole numbers

• Align the decimal points

• Align the denominators

• Align the numerators

What is the sum of 37.1 and 8.431?

• 46.531

• 44.531

• 45.431

• 45.531

How would you write 2 dollars to align it with a decimal number?

• 0.20

• 0.2

• 2.0

• 2.00