Working with Decimals, Fractions, and Whole Numbers

This video tutorial teaches how to solve real world problems using rational numbers. It covers calculating average speed with both decimal and fraction methods, and provides an example involving savings and spending. The tutorial emphasizes the importance of close reading, choosing the correct operation, and verifying solutions.

What is a common mistake when working with word problems involving rational numbers?

• Ignoring the problem statement

• Calculating too quickly

• Misreading or misinterpreting the problem

• Using the wrong units

How do you find the average speed of a car that travels 142.5 miles in 3.8 hours?

• Divide the distance by the time

• Subtract the time from the distance

• Add the distance and time

• Multiply the distance by the time

When dividing using decimals, what must you do if there is a decimal in the divisor?

• Add a zero to the divisor

• Convert the divisor to a fraction

• Ignore the decimal

• Move the decimal in the divisor and dividend

What is the fraction equivalent of 142.5 miles?

• 142 and 5/8 miles

• 142 and 1/2 miles

• 142 and 1/4 miles

• 142 and 3/4 miles

Gianna saved $25.50 and spent 2/3 of it on clothes. How much does she have left?

• $10.00

• $17.00

• $15.50

• $8.50

What operation would you use to find 1/3 of $25.50?

• Divide by 3

• Add 3

• Multiply by 3

• Subtract 3

What is the first step in solving real-world problems with rational numbers?

• Check the solution

• Choose the operation

• Close read the problem

• Calculate the answer