Mastering Operations with Rational Numbers

This video tutorial covers the basic operations with rational numbers, including addition, subtraction, multiplication, and division of fractions. It explains the importance of having common denominators for addition and subtraction, and how to handle negative numbers in multiplication. The tutorial also describes how to convert division into multiplication by flipping the second fraction. Key differences between these operations are highlighted to aid understanding.

In the example 3/6 - 1/2, what is the first step to solve it?

• Add the fractions together.

• Convert 1/2 to have a denominator of 6.

• Multiply the fractions.

• Subtract the numerators directly.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What must be true about the denominators when adding or subtracting fractions?

• One must be a multiple of the other.

• They must be prime numbers.

• They must be different.

• They must be the same.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

How do you handle the denominators when subtracting fractions with different denominators?

• Add the denominators together.

• Ignore the denominators.

• Subtract the smaller denominator from the larger one.

• Convert the denominators to be the same.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

When multiplying fractions, what do you do with the numerators and denominators?

• Multiply the numerators and denominators across.

• Subtract the numerators and denominators.

• Add the numerators and denominators.

• Divide the numerators and denominators.

Tags

CCSS.5.NF.B.6

What is the result of multiplying -3/6 by 1/2?

• 1/12

• 3/12

• -3/12

• -1/12

Tags

CCSS.7.NS.A.2A

What happens to the sign of the result when multiplying two negative fractions?

• The result is undefined.

• The result is zero.

• The result is positive.

• The result is negative.

Tags

CCSS.7.NS.A.2A

What is the first step in dividing fractions?

• Flip the first fraction.

• Add the fractions.

• Subtract the fractions.

• Convert the division into multiplication.

Tags

CCSS.6.NS.A.1

In the example 4/5 ÷ 2/3, what is the equivalent multiplication problem?

• 4/5 × 2/3

• 4/5 × 3/2

• 5/4 × 2/3

• 5/4 × 3/2

Tags

CCSS.6.NS.A.1

What is the result of 4/5 ÷ 2/3?

• 4/15

• 5/8

• 15/4

• 8/5

Tags

CCSS.6.NS.A.1

What must you do to the second fraction when dividing two fractions?

• Leave it as it is.

• Add it to the first fraction.

• Flip it and then multiply.

• Subtract it from the first fraction.

Tags

CCSS.6.NS.A.1