Subtracting with Double Regrouping Techniques

The video tutorial explains how to subtract 286 from 913 using the concept of regrouping, also known as borrowing. It begins by expanding the numbers to understand their place values and then demonstrates the subtraction process step-by-step. The tutorial highlights the importance of regrouping when a smaller number is subtracted from a larger one in a particular place value. Finally, it shows a simplified method of subtraction without expanding the numbers.

What is the expanded form of 913?

• 90 + 13

• 900 + 100 + 3

• 900 + 13

• 900 + 10 + 3

What is the expanded form of 286?

• 200 + 80 + 6

• 280 + 6

• 200 + 86

• 20 + 86

Why is regrouping necessary in the ones place?

• Because 80 is less than 10

• Because 10 is less than 80

• Because 6 is less than 3

• Because 3 is less than 6

What do we do when we cannot subtract 6 from 3 in the ones place?

• Subtract 3 from 6

• Regroup from the tens place

• Regroup from the hundreds place

• Add 10 to the ones place

After regrouping, what is 13 minus 6?

• 8

• 6

• 9

• 7

What problem arises in the tens place after regrouping from the ones place?

• We need to subtract 80 from 10

• We need to subtract 10 from 80

• We need to subtract 0 from 80

• We need to subtract 80 from 0

How do we solve the problem in the tens place after regrouping from the ones place?

• Regroup from the hundreds place

• Regroup from the ones place

• Add 100 to the tens place

• Subtract 80 from 10

What is 100 minus 80?

• 30

• 10

• 20

• 40

What is the final result of 913 minus 286?

• 637

• 647

• 617

• 627

What is the purpose of not expanding the numbers in the final step?

• To simplify the subtraction process

• To make the problem more complex

• To avoid regrouping

• To change the value of the numbers