Adding and Subtracting Rational Numbers Explained

Why is it important to practice adding and subtracting fractions without a calculator?

• It is a requirement for all math courses.

• It makes the process faster.

• Calculators are not allowed in exams.

• It helps improve mental math skills.

Tags

CCSS.7.NS.A.1C

What is a rational number?

• A number that is always negative.

• A number that cannot be divided.

• A number that is always positive.

• A number that can be written as a fraction.

What is the purpose of using fraction strips?

• To make fractions more complex.

• To replace the need for addition.

• To avoid using numbers.

• To visualize the concept of fractions.

Tags

CCSS.4.NF.B.3A

How do you add fractions with like denominators?

• Add the numerators and keep the denominator the same.

• Add both the numerators and denominators.

• Subtract the numerators and keep the denominator the same.

• Multiply the numerators and denominators.

Tags

CCSS.4.NF.B.3D

CCSS.4.NF.B.3C

What is the result of adding 1/4 and 2/4?

• 3/4

• 1/2

• 1/4

• 1

Tags

CCSS.4.NF.B.3D

CCSS.4.NF.B.3C

What is the first step in subtracting fractions with like denominators?

• Multiply the numerators and denominators.

• Add the numerators and keep the denominator the same.

• Subtract both the numerators and denominators.

• Subtract the numerators and keep the denominator the same.

Tags

CCSS.4.NF.B.3D

CCSS.4.NF.B.3C

What is the simplified form of -6/8?

• -3/4

• -1/2

• -2/3

• -1/4

What should you do if the fractions have unlike denominators?

• Find a common denominator.

• Add the numerators directly.

• Multiply the fractions.

• Subtract the denominators.

Tags

CCSS.7.NS.A.1C

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

• Subtract the smaller denominator from the larger one.

• Multiply the denominators together.

• List the multiples of each denominator and find the smallest common one.

• Add the denominators together.

How do you convert 2/3 and 1/2 to have a common denominator?

• Convert them to 3/4 and 2/4 respectively.

• Convert them to 4/6 and 3/6 respectively.

• Convert them to 1/3 and 1/2 respectively.

• Convert them to 2/6 and 1/6 respectively.