Solving One- and Two-Step Word Problems with Bar Models

This video tutorial covers lesson 3.4, focusing on problem-solving strategies for one and two-step word problems using multiplication. It introduces the use of diagrams, specifically bar models, to solve problems. The video provides examples, such as calculating the number of students cleaning a park, determining how many hot dogs were eaten at lunch, and finding out how many pens were bought. Each example demonstrates the process of identifying the problem, gathering necessary information, and applying multiplication to find the solution. The tutorial concludes with a preview of the next lesson, which will cover using arrays to model multiplication and find factors.

What is the first step in solving a word problem according to the video?

• Read the problem

• Determine the operation to use

• Draw a bar model

• Check the answer

What strategy is suggested for solving two-step word problems?

• Using variables

• Drawing bar models

• Guessing and checking

• Using a calculator

How many students in total were cleaning the park?

• 8 students

• 32 students

• 24 students

• 16 students

How many groups of students were there in the cleanup activity?

• Two groups

• Three groups

• Four groups

• Five groups

What is the purpose of using a purple square in the bar model?

• To highlight the total

• To indicate subtraction

• To represent unknown variables

• To separate different groups

What operation is used to find the total number of hot dogs eaten?

• Addition

• Subtraction

• Division

• Multiplication

How many people ate hot dogs at the lunch?

• Five people

• Ten people

• Seven people

• Twelve people

How many pens did Lisa buy in total?

• 20 pens

• 10 pens

• 15 pens

• 25 pens

What is the total number of blue pens Lisa bought?

• Four pens

• Two pens

• Eight pens

• Six pens

What mathematical concept will be covered in the next lesson?

• Subtraction

• Division

• Fractions

• Arrays