Understanding Basic Subtraction Concepts

The video tutorial explains how to solve a math problem involving the number of days students are not in school in the Lake School District. It introduces the problem as a part-whole type and demonstrates solving it using base 10, standard form, and expanded form subtraction methods. The tutorial emphasizes decomposing and regrouping numbers to find the solution, concluding that students are not in school for 187 days.

How many days are students in school each year in the Lake School District?

• 200 days

• 178 days

• 365 days

• 187 days

What type of problem is being solved in the video?

• Part-whole problem

• Comparison problem

• Multiplication problem

• Division problem

What is the first step in solving the subtraction problem?

• Subtract the numbers

• Multiply the numbers

• Add the numbers

• Divide the numbers

In the base 10 model, how many hundreds are there in the number 365?

• 4

• 2

• 1

• 3

What do you do if there are not enough ones to subtract?

• Add more ones

• Decompose a hundred

• Decompose a ten

• Skip the subtraction

How many ones are left after subtracting 8 ones from 15 ones?

• 7

• 6

• 8

• 5

What is the next step if there are not enough tens to subtract?

• Skip the subtraction

• Add more tens

• Decompose a hundred

• Decompose a ten

How many tens are left after subtracting 7 tens from 15 tens?

• 7

• 6

• 5

• 8

In expanded form, what is 365 represented as?

• 100 + 80 + 7

• 200 + 150 + 15

• 300 + 50 + 15

• 300 + 60 + 5

What is the result of 15 minus 8 in expanded form?

• 8

• 7

• 6

• 5