Understanding Rational Numbers and Decimals

The video tutorial covers solving word problems involving the addition and subtraction of rational numbers, specifically focusing on converting between decimals and fractions. It uses a practical example of calculating the remaining weight of nails after a project. The tutorial emphasizes the importance of choosing the right format for calculations and clearly labeling answers.

What is a rational number?

• A number that can be expressed as a fraction

• A number that is always an integer

• A number that cannot be expressed as a fraction

• A number that is always a decimal

How many pounds of nails did Garry initially have?

• 0.75 pounds

• 3 pounds

• 1.25 pounds

• 2 pounds

What is the first step in solving a word problem?

• Use a calculator

• Convert all numbers to fractions

• Write down the problem

• Guess the answer

What is the first step in solving Garry's nail problem?

• Add the nails he bought and already had

• Subtract the nails used

• Simplify the fractions

• Convert all numbers to decimals

What is the sum of 2 and 0.75?

• 2.5

• 3.25

• 2.75

• 3

How do you convert 0.75 to a fraction?

• 1/4

• 1/2

• 3/4

• 2/3

What is the purpose of finding common denominators?

• To convert fractions to decimals

• To make addition and subtraction easier

• To multiply fractions

• To simplify fractions

How do you simplify 75/100?

• 3/4

• 1/2

• 5/6

• 2/3

What is the decimal equivalent of 3/4?

• 0.6

• 0.75

• 0.8

• 0.5

What is the decimal equivalent of 1 and 2/5?

• 1.2

• 1.4

• 1.5

• 1.6