Adding and Subtracting Rational Numbers Challenge

What is the key requirement for adding or subtracting fractions?

• The numerators must be the same.

• The denominators must be the same.

• The fractions must be improper.

• The fractions must be mixed numbers.

What is the result of 2/5 + 1/5?

• 3/10

• 1/5

• 3/5

• 2/5

How do you simplify the fraction 4/8?

• 4/2

• 1/4

• 1/2

• 2/4

What is the least common multiple of 3 and 4?

• 6

• 9

• 15

• 12

What is the result of 2/3 + 3/4 when converted to a common denominator?

• 5/12

• 9/12

• 8/12

• 17/12

What must you do when adding or subtracting decimals?

• Round them to the nearest whole number.

• Convert them to fractions first.

• Line up the decimal points.

• Ignore the decimal points.

What is the result of 12.2 - 2.08?

• 10.02

• 10.20

• 10.12

• 10.10

How do you convert 2 and 1/2 to a decimal?

• 2.05

• 2.1

• 2.50

• 2.25

What is the result of 2.5 + 12.75?

• 15.00

• 15.25

• 15.50

• 15.75

What is the final answer for 2 and 2/3 + 3 and 4/5?

• 5 and 7/15

• 8 and 7/15

• 6 and 7/15

• 7 and 7/15