School Cafeteria (Use equations to represent multistep word problems with a letter for the unknown)

The video tutorial explains how to solve a word problem involving water bottles in a school cafeteria. It starts with 7 bottles from the previous day and adds 5 cases of 12 bottles each. The unknown total, represented by b, is calculated using the equation b = 7 + 5 * 12. The video emphasizes the importance of following the order of operations, specifically evaluating multiplication before addition, to avoid common mistakes. The lesson concludes with a summary of using equations to solve multi-step word problems.

How many water bottles were left in the cafeteria from the previous day?

• 5 bottles

• 7 bottles

• 60 bottles

• 12 bottles

If each case contains 12 bottles, how many bottles are there in 5 cases?

• 5 bottles

• 12 bottles

• 50 bottles

• 60 bottles

What is the correct equation to find the total number of bottles in the cafeteria?

• b = 7 * 12

• b = 7 + 5 + 12

• b = 7 + 5 * 12

• b = 5 * 12

What is the first step in evaluating the equation b = 7 + 5 * 12?

• Add 7 and 12

• Multiply 5 and 12

• Add 7 and 5

• Multiply 7 and 5

What is a common mistake when solving the equation for the total number of bottles?

• Multiplying before adding

• Forgetting to add the remaining bottles

• Adding 7 and 5 before multiplying by 12

• Using the wrong number of cases