Adding Decimals and Rational Numbers

The video tutorial covers adding rational numbers, including fractions and decimals. It begins with a review of the rules for adding numbers with the same or different signs. The instructor solves example problems involving fractions with the same and different denominators, demonstrating how to find the least common multiple. The tutorial also includes an example of adding decimals, emphasizing the importance of aligning decimal points.

What is the first step when adding rational numbers with different signs?

• Multiply the denominators

• Subtract the numerators

• Add the numerators

• Divide the numerators

When adding rational numbers with the same sign, what should you do?

• Add the numbers

• Divide the numbers

• Subtract the numbers

• Multiply the numbers

In the first example, what is the result of adding 3/5 and -1/5?

• 1/5

• 2/5

• 3/5

• 4/5

What is the least common multiple of 3 and 6 used in the second example?

• 12

• 18

• 9

• 6

How do you convert the improper fraction -11/6 to a mixed number?

• -1 and 1/6

• -1 and 5/6

• -2 and 5/6

• -2 and 1/6

What is the first step when adding decimals?

• Align the decimal points

• Add zeros to the numbers

• Multiply the numbers

• Subtract the numbers

In the decimal example, what is the result of adding -0.75 and -1.5?

• -2.25

• -1.25

• -3.25

• -2.75

What should you remember about the signs when adding decimals?

• Always add the numbers

• Ignore the signs

• Consider the signs to determine the result

• Multiply the numbers

How do you handle the decimal points when adding decimals?

• Multiply them

• Subtract them

• Align them

• Ignore them

What is the result of adding 1.5 and 0.75?

• 2.15

• 2.45

• 2.25

• 2.35