Decimal Operations and Problem Solving

The video tutorial covers Go Math Module 5, Lesson 5, focusing on applying operations with decimals. It begins with an essential question about solving problems involving multiplication and division of fractions and decimals, but focuses on decimals. Two example problems are presented: Naomi's earnings from mowing lawns and Casey's fabric purchase. The video guides viewers through analyzing the problems, formulating plans, and solving equations using decimal operations. Key steps include identifying important information, using order of operations, and performing division with decimals. The lesson concludes with a summary of the concepts covered.

What is the main focus of the lesson in this video?

• Addition and subtraction of decimals

• Solving equations with integers

• Multiplication and division of decimals

• Understanding fractions

How many hours did Naomi work in total over the two days?

• 6.75 hours

• 7.5 hours

• 6.5 hours

• 7 hours

What is the first step in solving Naomi's earnings problem?

• Divide the total earnings by the number of days

• Subtract the hours worked on the first day from the second day

• Multiply the hours worked by the hourly rate

• Analyze the problem to extract important information

What operation is performed after adding the total hours Naomi worked?

• Division

• Multiplication

• Addition

• Subtraction

What was Naomi's hourly earning rate?

• $9

• $8

• $7

• $6

What is the total length of fabric Casey bought?

• 10.6 yards

• 11.6 yards

• 12 yards

• 12.6 yards

What is the first step in solving Casey's fabric cost problem?

• Subtract the cost of blue fabric from red fabric

• Divide the total cost by the number of yards

• Add the lengths of blue and red fabric

• Multiply the total yards by the cost per yard

What is the cost per yard of fabric Casey bought?

• $6

• $7

• $5

• $4

What method is suggested for dealing with large numbers in division?

• Estimation

• Guess and check

• Trial and error

• Rounding

What should be done to the decimal in the divisor before performing division?

• Remove it

• Add a zero

• Move it to the left

• Move it to the right