Subtraction Concepts and Techniques

The video tutorial explains how to use pictorial models, specifically base 10 blocks, to perform subtraction. It covers two examples: one without regrouping and another with regrouping. The instructor demonstrates how to draw and manipulate base 10 blocks to solve subtraction problems, emphasizing the importance of starting with the highest number and borrowing when necessary. The tutorial concludes with an invitation for questions.

What is the first step in creating a pictorial model for subtraction?

• Start with the smallest number

• Subtract the numbers directly

• Use a calculator

• Draw the base 10 blocks for the highest number

How many hundreds are drawn for the number 479?

• Three

• Four

• Five

• Six

When subtracting 153 from 479, how many ones are left after taking away three?

• Four

• Five

• Six

• Seven

What is the result of subtracting 153 from 479?

• 329

• 346

• 326

• 336

What does regrouping involve in subtraction?

• Using a calculator

• Carrying over a block from a higher place value

• Adding more blocks

• Drawing new blocks

How many tens are drawn for the number 352?

• Five

• Four

• Six

• Three

What is the first step when subtracting 148 from 352 with regrouping?

• Borrow a ten

• Subtract the ones

• Subtract the tens

• Subtract the hundreds

After borrowing a ten, how many ones are left when subtracting 148 from 352?

• Five

• Four

• Three

• Two

What is the result of subtracting 148 from 352?

• 204

• 214

• 234

• 224

How many hundreds are left after subtracting 148 from 352?

• Four

• Two

• Three

• One